/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.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 04:57:14,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 04:57:14,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 04:57:15,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 04:57:15,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 04:57:15,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 04:57:15,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 04:57:15,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 04:57:15,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 04:57:15,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 04:57:15,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 04:57:15,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 04:57:15,064 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.epf [2022-01-18 04:57:15,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 04:57:15,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 04:57:15,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 04:57:15,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 04:57:15,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 04:57:15,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 04:57:15,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 04:57:15,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 04:57:15,090 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 04:57:15,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 04:57:15,091 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 04:57:15,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 04:57:15,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 04:57:15,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 04:57:15,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 04:57:15,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 04:57:15,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:57:15,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 04:57:15,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 04:57:15,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 04:57:15,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 04:57:15,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 04:57:15,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 04:57:15,280 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 04:57:15,284 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 04:57:15,285 INFO L432 ainManager$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 04:57:15,285 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 04:57:15,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 04:57:15,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 04:57:15,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 04:57:15,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 04:57:15,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 04:57:15,311 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,316 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,320 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 04:57:15,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 04:57:15,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 04:57:15,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 04:57:15,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 04:57:15,327 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,327 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,328 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,328 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,330 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,332 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,332 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 04:57:15,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 04:57:15,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 04:57:15,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 04:57:15,347 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 04:57:15" (1/1) ... [2022-01-18 04:57:15,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:57:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:15,382 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 04:57:15,385 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 04:57:15,406 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 04:57:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 04:57:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 04:57:15,406 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 04:57:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 04:57:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 04:57:15,407 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 04:57:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 04:57:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 04:57:15,407 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 04:57:15,407 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 04:57:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 04:57:15,407 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 04:57:15,449 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 04:57:15,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 04:57:15,612 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 04:57:15,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 04:57:15,705 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 04:57:15,707 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:57:15 BoogieIcfgContainer [2022-01-18 04:57:15,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 04:57:15,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 04:57:15,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 04:57:15,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 04:57:15,715 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 04:57:15" (1/2) ... [2022-01-18 04:57:15,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c588 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:57:15, skipping insertion in model container [2022-01-18 04:57:15,716 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 04:57:15" (2/2) ... [2022-01-18 04:57:15,717 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2022-01-18 04:57:15,720 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 04:57:15,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 04:57:15,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 04:57:15,720 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 04:57:15,770 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 04:57:15,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 04:57:15,810 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 04:57:15,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 04:57:15,815 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-01-18 04:57:15,835 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 04:57:15,837 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 04:57:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 04:57:15,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:15,843 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 04:57:15,844 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:15,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1091082122, now seen corresponding path program 1 times [2022-01-18 04:57:15,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032022916] [2022-01-18 04:57:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:15,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:16,030 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 04:57:16,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032022916] [2022-01-18 04:57:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032022916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:57:16,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:57:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:57:16,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530200397] [2022-01-18 04:57:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:57:16,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:57:16,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:57:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:57:16,058 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 04:57:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:16,165 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2022-01-18 04:57:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:57:16,167 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 04:57:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:16,173 INFO L225 Difference]: With dead ends: 192 [2022-01-18 04:57:16,174 INFO L226 Difference]: Without dead ends: 129 [2022-01-18 04:57:16,177 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 04:57:16,181 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 04:57:16,182 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 04:57:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-18 04:57:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-01-18 04:57:16,208 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 04:57:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-18 04:57:16,209 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-18 04:57:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:16,210 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-18 04:57:16,210 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 04:57:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-18 04:57:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 04:57:16,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:16,211 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 04:57:16,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 04:57:16,212 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2097087164, now seen corresponding path program 1 times [2022-01-18 04:57:16,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952341283] [2022-01-18 04:57:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:16,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:16,252 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 04:57:16,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952341283] [2022-01-18 04:57:16,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952341283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:57:16,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:57:16,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 04:57:16,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857615327] [2022-01-18 04:57:16,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:57:16,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:57:16,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:57:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:57:16,255 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 04:57:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:16,325 INFO L93 Difference]: Finished difference Result 221 states and 640 transitions. [2022-01-18 04:57:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:57:16,325 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 04:57:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:16,329 INFO L225 Difference]: With dead ends: 221 [2022-01-18 04:57:16,329 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 04:57:16,330 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 04:57:16,334 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 04:57:16,335 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 04:57:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 04:57:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-01-18 04:57:16,346 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 04:57:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2022-01-18 04:57:16,346 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2022-01-18 04:57:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:16,347 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2022-01-18 04:57:16,347 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 04:57:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2022-01-18 04:57:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:16,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:16,348 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 04:57:16,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 04:57:16,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -30499761, now seen corresponding path program 1 times [2022-01-18 04:57:16,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:16,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029771584] [2022-01-18 04:57:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:16,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:16,521 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 04:57:16,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:16,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029771584] [2022-01-18 04:57:16,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029771584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:16,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804218252] [2022-01-18 04:57:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:16,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:16,527 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 04:57:16,529 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 04:57:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:57:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:17,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:17,346 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 04:57:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:17,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:17,828 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 121 treesize of output 105 [2022-01-18 04:57:17,957 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 04:57:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804218252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:17,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:17,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 04:57:17,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867331534] [2022-01-18 04:57:17,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:17,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:57:17,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:57:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:57:17,959 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 04:57:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:19,801 INFO L93 Difference]: Finished difference Result 468 states and 1378 transitions. [2022-01-18 04:57:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:57:19,802 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 04:57:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:19,804 INFO L225 Difference]: With dead ends: 468 [2022-01-18 04:57:19,804 INFO L226 Difference]: Without dead ends: 380 [2022-01-18 04:57:19,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 04:57:19,805 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 262 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:19,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 296 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:57:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-18 04:57:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 204. [2022-01-18 04:57:19,817 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 04:57:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2022-01-18 04:57:19,818 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2022-01-18 04:57:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:19,818 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2022-01-18 04:57:19,818 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 04:57:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2022-01-18 04:57:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:19,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:19,819 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 04:57:19,837 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 04:57:20,035 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 04:57:20,036 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1742095211, now seen corresponding path program 2 times [2022-01-18 04:57:20,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:20,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352134241] [2022-01-18 04:57:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:20,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:20,152 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 04:57:20,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:20,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352134241] [2022-01-18 04:57:20,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352134241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:20,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611599669] [2022-01-18 04:57:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:20,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:20,154 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 04:57:20,155 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 04:57:20,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:20,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:57:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:20,416 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 143 treesize of output 115 [2022-01-18 04:57:20,588 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 04:57:20,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:20,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:20,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:21,015 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 04:57:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611599669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:21,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:21,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 04:57:21,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658102893] [2022-01-18 04:57:21,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:57:21,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:57:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:57:21,016 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 04:57:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:21,655 INFO L93 Difference]: Finished difference Result 382 states and 1095 transitions. [2022-01-18 04:57:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:57:21,655 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 04:57:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:21,657 INFO L225 Difference]: With dead ends: 382 [2022-01-18 04:57:21,657 INFO L226 Difference]: Without dead ends: 349 [2022-01-18 04:57:21,657 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 04:57:21,658 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 04:57:21,658 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 04:57:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-18 04:57:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 214. [2022-01-18 04:57:21,666 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 04:57:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2022-01-18 04:57:21,667 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2022-01-18 04:57:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:21,667 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2022-01-18 04:57:21,667 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 04:57:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2022-01-18 04:57:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:21,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:21,668 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 04:57:21,687 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 04:57:21,884 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 04:57:21,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1059891211, now seen corresponding path program 3 times [2022-01-18 04:57:21,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:21,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316857292] [2022-01-18 04:57:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:21,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:22,024 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 04:57:22,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:22,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316857292] [2022-01-18 04:57:22,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316857292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:22,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387031394] [2022-01-18 04:57:22,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:22,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:22,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:22,026 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 04:57:22,027 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 04:57:22,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:57:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:57:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:22,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:22,689 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 04:57:22,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:23,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:23,070 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 119 treesize of output 105 [2022-01-18 04:57:23,221 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 04:57:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387031394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:23,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:23,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 04:57:23,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011225754] [2022-01-18 04:57:23,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:23,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:57:23,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:57:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:57:23,222 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 04:57:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:24,607 INFO L93 Difference]: Finished difference Result 635 states and 1779 transitions. [2022-01-18 04:57:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 04:57:24,607 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 04:57:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:24,609 INFO L225 Difference]: With dead ends: 635 [2022-01-18 04:57:24,609 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 04:57:24,610 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 04:57:24,610 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 205 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:24,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 317 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 04:57:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 04:57:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 229. [2022-01-18 04:57:24,618 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 04:57:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 707 transitions. [2022-01-18 04:57:24,618 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 707 transitions. Word has length 19 [2022-01-18 04:57:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:24,619 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 707 transitions. [2022-01-18 04:57:24,619 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 04:57:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 707 transitions. [2022-01-18 04:57:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:24,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:24,620 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 04:57:24,635 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 04:57:24,835 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 04:57:24,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1696358065, now seen corresponding path program 4 times [2022-01-18 04:57:24,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:24,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310722700] [2022-01-18 04:57:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:24,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:24,968 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 04:57:24,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310722700] [2022-01-18 04:57:24,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310722700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:24,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957869585] [2022-01-18 04:57:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:24,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:24,969 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 04:57:24,970 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 04:57:25,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:25,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:57:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:25,206 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 136 treesize of output 108 [2022-01-18 04:57:25,641 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 04:57:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:26,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:26,105 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 166 treesize of output 142 [2022-01-18 04:57:26,261 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 04:57:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957869585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:26,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:26,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 04:57:26,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970510679] [2022-01-18 04:57:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:26,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:57:26,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:57:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:57:26,263 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 04:57:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:27,219 INFO L93 Difference]: Finished difference Result 441 states and 1281 transitions. [2022-01-18 04:57:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:57:27,220 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 04:57:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:27,221 INFO L225 Difference]: With dead ends: 441 [2022-01-18 04:57:27,221 INFO L226 Difference]: Without dead ends: 386 [2022-01-18 04:57:27,222 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 04:57:27,222 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 04:57:27,223 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 04:57:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-18 04:57:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 234. [2022-01-18 04:57:27,228 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 04:57:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 727 transitions. [2022-01-18 04:57:27,229 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 727 transitions. Word has length 19 [2022-01-18 04:57:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:27,230 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 727 transitions. [2022-01-18 04:57:27,230 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 04:57:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 727 transitions. [2022-01-18 04:57:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:27,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:27,230 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 04:57:27,246 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 04:57:27,441 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 04:57:27,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -708866453, now seen corresponding path program 5 times [2022-01-18 04:57:27,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:27,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299040448] [2022-01-18 04:57:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:27,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:27,574 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 04:57:27,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:27,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299040448] [2022-01-18 04:57:27,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299040448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:27,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134167041] [2022-01-18 04:57:27,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:27,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:27,575 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 04:57:27,576 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 04:57:27,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:57:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:27,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:28,062 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 04:57:28,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:28,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:28,612 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 04:57:28,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134167041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:28,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:28,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-01-18 04:57:28,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792533381] [2022-01-18 04:57:28,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:28,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 04:57:28,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 04:57:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:57:28,613 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 04:57:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:29,607 INFO L93 Difference]: Finished difference Result 460 states and 1302 transitions. [2022-01-18 04:57:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:57:29,608 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 04:57:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:29,609 INFO L225 Difference]: With dead ends: 460 [2022-01-18 04:57:29,609 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 04:57:29,610 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 04:57:29,610 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 04:57:29,610 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 04:57:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 04:57:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 244. [2022-01-18 04:57:29,615 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 04:57:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 752 transitions. [2022-01-18 04:57:29,616 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 752 transitions. Word has length 19 [2022-01-18 04:57:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:29,616 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 752 transitions. [2022-01-18 04:57:29,616 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 04:57:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 752 transitions. [2022-01-18 04:57:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:29,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:29,617 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 04:57:29,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:29,823 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 04:57:29,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -414706651, now seen corresponding path program 6 times [2022-01-18 04:57:29,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860873935] [2022-01-18 04:57:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:29,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:29,923 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 04:57:29,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860873935] [2022-01-18 04:57:29,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860873935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38554470] [2022-01-18 04:57:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:29,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:29,925 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 04:57:29,926 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 04:57:29,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:57:29,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 04:57:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:30,208 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 147 treesize of output 119 [2022-01-18 04:57:30,398 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 04:57:30,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:30,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:30,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:30,807 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 04:57:30,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38554470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:30,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:30,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 04:57:30,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501270880] [2022-01-18 04:57:30,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:57:30,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:57:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:57:30,809 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 04:57:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:31,345 INFO L93 Difference]: Finished difference Result 453 states and 1342 transitions. [2022-01-18 04:57:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:57:31,346 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 04:57:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:31,347 INFO L225 Difference]: With dead ends: 453 [2022-01-18 04:57:31,347 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 04:57:31,348 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 04:57:31,348 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:57:31,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 171 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:57:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 04:57:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 254. [2022-01-18 04:57:31,363 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 04:57:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 792 transitions. [2022-01-18 04:57:31,364 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 792 transitions. Word has length 19 [2022-01-18 04:57:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:31,364 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 792 transitions. [2022-01-18 04:57:31,364 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 04:57:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 792 transitions. [2022-01-18 04:57:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:31,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:31,365 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 04:57:31,380 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 04:57:31,579 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 04:57:31,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1078274223, now seen corresponding path program 7 times [2022-01-18 04:57:31,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5229485] [2022-01-18 04:57:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:31,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:31,677 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 04:57:31,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5229485] [2022-01-18 04:57:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5229485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609755353] [2022-01-18 04:57:31,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:31,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:31,679 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 04:57:31,680 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 04:57:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:57:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:31,823 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 160 treesize of output 128 [2022-01-18 04:57:32,212 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 04:57:32,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:32,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:32,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:32,773 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 04:57:32,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609755353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:32,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:32,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 04:57:32,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297555242] [2022-01-18 04:57:32,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:57:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:57:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:57:32,775 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 04:57:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:33,965 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2022-01-18 04:57:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:57:33,965 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 04:57:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:33,967 INFO L225 Difference]: With dead ends: 474 [2022-01-18 04:57:33,967 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 04:57:33,967 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 04:57:33,967 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 04:57:33,968 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 04:57:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 04:57:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2022-01-18 04:57:33,972 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 04:57:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 792 transitions. [2022-01-18 04:57:33,973 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 792 transitions. Word has length 19 [2022-01-18 04:57:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:33,973 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 792 transitions. [2022-01-18 04:57:33,973 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 04:57:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 792 transitions. [2022-01-18 04:57:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:33,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:33,974 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 04:57:33,989 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 04:57:34,187 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 04:57:34,187 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 441807369, now seen corresponding path program 8 times [2022-01-18 04:57:34,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:34,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071720862] [2022-01-18 04:57:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:34,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:34,341 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 04:57:34,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071720862] [2022-01-18 04:57:34,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071720862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879070370] [2022-01-18 04:57:34,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:34,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:34,343 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 04:57:34,343 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 04:57:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:57:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:34,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 04:57:34,685 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 142 [2022-01-18 04:57:35,121 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 04:57:35,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:35,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:35,618 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 135 treesize of output 117 [2022-01-18 04:57:35,809 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 04:57:35,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879070370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:35,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:35,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:57:35,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247916052] [2022-01-18 04:57:35,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:35,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:57:35,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:57:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:57:35,810 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 04:57:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:38,764 INFO L93 Difference]: Finished difference Result 832 states and 2354 transitions. [2022-01-18 04:57:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:57:38,765 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 04:57:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:38,768 INFO L225 Difference]: With dead ends: 832 [2022-01-18 04:57:38,768 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 04:57:38,769 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 04:57:38,769 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 04:57:38,770 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 04:57:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 04:57:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 293. [2022-01-18 04:57:38,780 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 04:57:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 911 transitions. [2022-01-18 04:57:38,781 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 911 transitions. Word has length 19 [2022-01-18 04:57:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:38,781 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 911 transitions. [2022-01-18 04:57:38,781 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 04:57:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 911 transitions. [2022-01-18 04:57:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:38,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:38,782 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 04:57:38,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:39,000 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 04:57:39,000 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:39,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1429298981, now seen corresponding path program 9 times [2022-01-18 04:57:39,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:39,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005537606] [2022-01-18 04:57:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:39,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:39,094 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 04:57:39,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005537606] [2022-01-18 04:57:39,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005537606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760735517] [2022-01-18 04:57:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:39,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:39,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:39,096 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 04:57:39,096 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 04:57:39,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:57:39,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:57:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:39,333 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 131 treesize of output 105 [2022-01-18 04:57:39,624 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 04:57:39,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:40,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:57:40,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:40,121 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 04:57:40,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760735517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:40,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 04:57:40,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076417540] [2022-01-18 04:57:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:57:40,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:57:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:57:40,123 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 04:57:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:41,668 INFO L93 Difference]: Finished difference Result 642 states and 1838 transitions. [2022-01-18 04:57:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:57:41,669 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 04:57:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:41,671 INFO L225 Difference]: With dead ends: 642 [2022-01-18 04:57:41,671 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 04:57:41,671 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 04:57:41,672 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 04:57:41,672 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 04:57:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 04:57:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 312. [2022-01-18 04:57:41,678 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 04:57:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 965 transitions. [2022-01-18 04:57:41,679 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 965 transitions. Word has length 19 [2022-01-18 04:57:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:41,679 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 965 transitions. [2022-01-18 04:57:41,679 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 04:57:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 965 transitions. [2022-01-18 04:57:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:41,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:41,680 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 04:57:41,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:41,894 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 04:57:41,894 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1917424947, now seen corresponding path program 10 times [2022-01-18 04:57:41,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964943766] [2022-01-18 04:57:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:41,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:41,997 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 04:57:41,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:41,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964943766] [2022-01-18 04:57:41,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964943766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:41,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781963038] [2022-01-18 04:57:41,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:41,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:41,999 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 04:57:41,999 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 04:57:42,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 04:57:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:42,227 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 123 treesize of output 99 [2022-01-18 04:57:42,599 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 04:57:42,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:43,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:43,071 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 114 treesize of output 95 [2022-01-18 04:57:43,148 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 04:57:43,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781963038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:43,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:43,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 04:57:43,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440706135] [2022-01-18 04:57:43,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:43,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:57:43,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:57:43,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:57:43,149 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 04:57:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:45,097 INFO L93 Difference]: Finished difference Result 735 states and 2097 transitions. [2022-01-18 04:57:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:57:45,098 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 04:57:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:45,100 INFO L225 Difference]: With dead ends: 735 [2022-01-18 04:57:45,100 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 04:57:45,100 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 04:57:45,101 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 04:57:45,101 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 04:57:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 04:57:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 326. [2022-01-18 04:57:45,107 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 04:57:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1025 transitions. [2022-01-18 04:57:45,108 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1025 transitions. Word has length 19 [2022-01-18 04:57:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:45,108 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 1025 transitions. [2022-01-18 04:57:45,108 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 04:57:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1025 transitions. [2022-01-18 04:57:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:45,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:45,109 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 04:57:45,125 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 04:57:45,324 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 04:57:45,324 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:45,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1390050737, now seen corresponding path program 11 times [2022-01-18 04:57:45,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:45,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230019207] [2022-01-18 04:57:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:45,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:45,469 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 04:57:45,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230019207] [2022-01-18 04:57:45,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230019207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:45,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044637089] [2022-01-18 04:57:45,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:45,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:45,471 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 04:57:45,472 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 04:57:45,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:45,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 04:57:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:45,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:45,850 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 04:57:45,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:46,207 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:46,207 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 152 treesize of output 125 [2022-01-18 04:57:46,289 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 04:57:46,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044637089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:46,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:46,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 04:57:46,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259952474] [2022-01-18 04:57:46,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:46,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:57:46,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:57:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:57:46,290 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 04:57:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:47,245 INFO L93 Difference]: Finished difference Result 715 states and 2035 transitions. [2022-01-18 04:57:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:57:47,245 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 04:57:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:47,248 INFO L225 Difference]: With dead ends: 715 [2022-01-18 04:57:47,248 INFO L226 Difference]: Without dead ends: 609 [2022-01-18 04:57:47,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:57:47,248 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 04:57:47,248 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 04:57:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-18 04:57:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 342. [2022-01-18 04:57:47,254 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 04:57:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1070 transitions. [2022-01-18 04:57:47,255 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1070 transitions. Word has length 19 [2022-01-18 04:57:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:47,255 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1070 transitions. [2022-01-18 04:57:47,255 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 04:57:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1070 transitions. [2022-01-18 04:57:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:57:47,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:47,256 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 04:57:47,272 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 04:57:47,472 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 04:57:47,472 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:47,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1631982851, now seen corresponding path program 12 times [2022-01-18 04:57:47,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:47,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825208068] [2022-01-18 04:57:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:47,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:47,593 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 04:57:47,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825208068] [2022-01-18 04:57:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825208068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28018261] [2022-01-18 04:57:47,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:47,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:47,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:47,594 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 04:57:47,595 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 04:57:47,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:57:47,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 04:57:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:47,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:48,090 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 04:57:48,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:48,470 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:48,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:57:48,548 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 04:57:48,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28018261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:48,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:48,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:57:48,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643902546] [2022-01-18 04:57:48,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:48,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:57:48,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:57:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:57:48,550 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 04:57:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:52,091 INFO L93 Difference]: Finished difference Result 1048 states and 2909 transitions. [2022-01-18 04:57:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 04:57:52,091 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 04:57:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:52,095 INFO L225 Difference]: With dead ends: 1048 [2022-01-18 04:57:52,095 INFO L226 Difference]: Without dead ends: 911 [2022-01-18 04:57:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=861, Invalid=2921, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 04:57:52,096 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 04:57:52,096 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 04:57:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-18 04:57:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 358. [2022-01-18 04:57:52,104 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 04:57:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1113 transitions. [2022-01-18 04:57:52,105 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1113 transitions. Word has length 19 [2022-01-18 04:57:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:52,105 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1113 transitions. [2022-01-18 04:57:52,105 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 04:57:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1113 transitions. [2022-01-18 04:57:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:52,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:52,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:52,122 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 04:57:52,319 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 04:57:52,319 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1561184996, now seen corresponding path program 13 times [2022-01-18 04:57:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931027494] [2022-01-18 04:57:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:52,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:52,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931027494] [2022-01-18 04:57:52,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931027494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057027097] [2022-01-18 04:57:52,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:52,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:52,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:52,416 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 04:57:52,417 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 04:57:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:52,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:52,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:52,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:52,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:57:52,723 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 04:57:52,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057027097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:52,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:52,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 04:57:52,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473490634] [2022-01-18 04:57:52,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:52,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:57:52,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:57:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:57:52,724 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 04:57:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:53,111 INFO L93 Difference]: Finished difference Result 580 states and 1706 transitions. [2022-01-18 04:57:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:53,112 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 04:57:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:53,114 INFO L225 Difference]: With dead ends: 580 [2022-01-18 04:57:53,114 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 04:57:53,114 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 04:57:53,115 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 04:57:53,115 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 04:57:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 04:57:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 376. [2022-01-18 04:57:53,121 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 04:57:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1168 transitions. [2022-01-18 04:57:53,121 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1168 transitions. Word has length 20 [2022-01-18 04:57:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:53,122 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1168 transitions. [2022-01-18 04:57:53,122 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 04:57:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1168 transitions. [2022-01-18 04:57:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:53,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:53,122 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:53,141 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 04:57:53,339 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 04:57:53,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 463696994, now seen corresponding path program 14 times [2022-01-18 04:57:53,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:53,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347695308] [2022-01-18 04:57:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:53,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:53,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347695308] [2022-01-18 04:57:53,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347695308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522363164] [2022-01-18 04:57:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:53,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:53,422 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 04:57:53,430 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 04:57:53,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:53,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:53,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:53,746 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:53,746 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 49 treesize of output 40 [2022-01-18 04:57:53,771 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 04:57:53,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522363164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:53,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:53,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:57:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476179797] [2022-01-18 04:57:53,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:53,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:57:53,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:57:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:57:53,772 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 04:57:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:54,143 INFO L93 Difference]: Finished difference Result 632 states and 1827 transitions. [2022-01-18 04:57:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:54,143 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 04:57:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:54,145 INFO L225 Difference]: With dead ends: 632 [2022-01-18 04:57:54,146 INFO L226 Difference]: Without dead ends: 632 [2022-01-18 04:57:54,146 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 04:57:54,149 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 203 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:57:54,149 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 04:57:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-18 04:57:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 379. [2022-01-18 04:57:54,155 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 04:57:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1179 transitions. [2022-01-18 04:57:54,156 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1179 transitions. Word has length 20 [2022-01-18 04:57:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:54,156 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1179 transitions. [2022-01-18 04:57:54,156 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 04:57:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1179 transitions. [2022-01-18 04:57:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:54,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:54,157 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 04:57:54,187 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 04:57:54,371 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 04:57:54,371 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1345774428, now seen corresponding path program 15 times [2022-01-18 04:57:54,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:54,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365546614] [2022-01-18 04:57:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:54,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:54,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365546614] [2022-01-18 04:57:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365546614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472404548] [2022-01-18 04:57:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:57:54,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:54,450 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 04:57:54,451 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 04:57:54,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:57:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:54,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:57:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:54,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:54,745 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:54,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:57:54,766 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 04:57:54,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472404548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:54,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:54,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 04:57:54,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960782874] [2022-01-18 04:57:54,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:54,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:57:54,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:57:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:57:54,767 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 04:57:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:55,144 INFO L93 Difference]: Finished difference Result 589 states and 1724 transitions. [2022-01-18 04:57:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:55,144 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 04:57:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:55,146 INFO L225 Difference]: With dead ends: 589 [2022-01-18 04:57:55,146 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 04:57:55,147 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 04:57:55,147 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 04:57:55,147 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 04:57:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 04:57:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 379. [2022-01-18 04:57:55,154 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 04:57:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1176 transitions. [2022-01-18 04:57:55,155 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1176 transitions. Word has length 20 [2022-01-18 04:57:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:55,155 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1176 transitions. [2022-01-18 04:57:55,155 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 04:57:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1176 transitions. [2022-01-18 04:57:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:55,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:55,156 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 04:57:55,172 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 04:57:55,371 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 04:57:55,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -42649272, now seen corresponding path program 16 times [2022-01-18 04:57:55,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340356222] [2022-01-18 04:57:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:55,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:55,463 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 04:57:55,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340356222] [2022-01-18 04:57:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340356222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455604790] [2022-01-18 04:57:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:57:55,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:55,465 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 04:57:55,470 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 04:57:55,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:57:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:55,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:55,639 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 65 treesize of output 51 [2022-01-18 04:57:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:55,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:55,850 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:55,850 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 40 [2022-01-18 04:57:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455604790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:55,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:55,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:57:55,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947111686] [2022-01-18 04:57:55,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:57:55,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:55,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:57:55,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:57:55,870 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 04:57:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:56,295 INFO L93 Difference]: Finished difference Result 574 states and 1690 transitions. [2022-01-18 04:57:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:56,295 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 04:57:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:56,297 INFO L225 Difference]: With dead ends: 574 [2022-01-18 04:57:56,297 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 04:57:56,297 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 04:57:56,298 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 04:57:56,298 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 04:57:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 04:57:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 385. [2022-01-18 04:57:56,303 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 04:57:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1198 transitions. [2022-01-18 04:57:56,304 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1198 transitions. Word has length 20 [2022-01-18 04:57:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:56,304 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1198 transitions. [2022-01-18 04:57:56,305 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 04:57:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1198 transitions. [2022-01-18 04:57:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:56,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:56,305 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:56,321 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 04:57:56,508 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 04:57:56,508 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash 839428162, now seen corresponding path program 17 times [2022-01-18 04:57:56,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:56,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036293345] [2022-01-18 04:57:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:56,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:56,604 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 04:57:56,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:56,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036293345] [2022-01-18 04:57:56,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036293345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:56,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961283500] [2022-01-18 04:57:56,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:57:56,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:56,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:56,612 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 04:57:56,613 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 04:57:56,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:57:56,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:56,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:56,780 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 65 treesize of output 51 [2022-01-18 04:57:56,840 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 04:57:56,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:56,951 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:56,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:57:56,975 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 04:57:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961283500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:56,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:56,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:57:56,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926941165] [2022-01-18 04:57:56,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:56,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:57:56,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:57:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:57:56,976 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 04:57:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:57,408 INFO L93 Difference]: Finished difference Result 580 states and 1697 transitions. [2022-01-18 04:57:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:57:57,408 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 04:57:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:57,410 INFO L225 Difference]: With dead ends: 580 [2022-01-18 04:57:57,410 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 04:57:57,411 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 04:57:57,411 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 04:57:57,411 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 04:57:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 04:57:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 382. [2022-01-18 04:57:57,417 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 04:57:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1187 transitions. [2022-01-18 04:57:57,417 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1187 transitions. Word has length 20 [2022-01-18 04:57:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:57,418 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1187 transitions. [2022-01-18 04:57:57,418 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 04:57:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1187 transitions. [2022-01-18 04:57:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:57,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:57,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:57,435 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 04:57:57,624 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 04:57:57,625 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 304198360, now seen corresponding path program 18 times [2022-01-18 04:57:57,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:57,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485497899] [2022-01-18 04:57:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:57,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:57,737 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 04:57:57,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485497899] [2022-01-18 04:57:57,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485497899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880621771] [2022-01-18 04:57:57,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:57:57,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:57,738 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 04:57:57,739 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 04:57:57,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:57:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:57:57,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:57,950 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 54 treesize of output 42 [2022-01-18 04:57:57,976 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 04:57:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:58,082 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:58,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:57:58,101 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 04:57:58,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880621771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:58,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:58,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:57:58,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282283694] [2022-01-18 04:57:58,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:57:58,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:57:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:57:58,102 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 04:57:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:58,480 INFO L93 Difference]: Finished difference Result 538 states and 1602 transitions. [2022-01-18 04:57:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:58,481 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 04:57:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:58,483 INFO L225 Difference]: With dead ends: 538 [2022-01-18 04:57:58,483 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 04:57:58,483 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 04:57:58,483 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 04:57:58,483 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 04:57:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 04:57:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2022-01-18 04:57:58,489 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 04:57:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1184 transitions. [2022-01-18 04:57:58,490 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1184 transitions. Word has length 20 [2022-01-18 04:57:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1184 transitions. [2022-01-18 04:57:58,490 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 04:57:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1184 transitions. [2022-01-18 04:57:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:58,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:58,491 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:57:58,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 04:57:58,703 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 04:57:58,704 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash -928447552, now seen corresponding path program 19 times [2022-01-18 04:57:58,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:58,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771304549] [2022-01-18 04:57:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:58,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:58,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771304549] [2022-01-18 04:57:58,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771304549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608093239] [2022-01-18 04:57:58,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:57:58,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:58,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:58,805 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 04:57:58,809 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 04:57:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:58,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:57:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:57:58,988 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 65 treesize of output 51 [2022-01-18 04:57:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:59,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:57:59,191 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:57:59,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:57:59,210 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 04:57:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608093239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:57:59,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:57:59,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:57:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448980611] [2022-01-18 04:57:59,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:57:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:57:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:57:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:57:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:57:59,212 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 04:57:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:57:59,687 INFO L93 Difference]: Finished difference Result 628 states and 1827 transitions. [2022-01-18 04:57:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:57:59,688 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 04:57:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:57:59,690 INFO L225 Difference]: With dead ends: 628 [2022-01-18 04:57:59,690 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 04:57:59,690 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 04:57:59,690 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 04:57:59,690 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 04:57:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 04:57:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 391. [2022-01-18 04:57:59,696 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 04:57:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1217 transitions. [2022-01-18 04:57:59,697 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1217 transitions. Word has length 20 [2022-01-18 04:57:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:57:59,697 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1217 transitions. [2022-01-18 04:57:59,697 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 04:57:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1217 transitions. [2022-01-18 04:57:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:57:59,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:57:59,698 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 04:57:59,714 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 04:57:59,907 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 04:57:59,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:57:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:57:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -46370118, now seen corresponding path program 20 times [2022-01-18 04:57:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:57:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224391520] [2022-01-18 04:57:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:57:59,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:57:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:57:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:57:59,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:57:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224391520] [2022-01-18 04:57:59,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224391520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:57:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308256888] [2022-01-18 04:57:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:57:59,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:57:59,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:57:59,987 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 04:57:59,989 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 04:58:00,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:00,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:00,210 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 04:58:00,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:00,321 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:00,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:00,340 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 04:58:00,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308256888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:00,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:00,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 04:58:00,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196527531] [2022-01-18 04:58:00,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:00,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:58:00,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:58:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:58:00,341 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 04:58:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:00,789 INFO L93 Difference]: Finished difference Result 634 states and 1834 transitions. [2022-01-18 04:58:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:00,790 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 04:58:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:00,792 INFO L225 Difference]: With dead ends: 634 [2022-01-18 04:58:00,792 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 04:58:00,792 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 04:58:00,792 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 04:58:00,793 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 04:58:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 04:58:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 388. [2022-01-18 04:58:00,798 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 04:58:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1206 transitions. [2022-01-18 04:58:00,799 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1206 transitions. Word has length 20 [2022-01-18 04:58:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:00,799 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1206 transitions. [2022-01-18 04:58:00,799 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 04:58:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1206 transitions. [2022-01-18 04:58:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:00,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:00,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:00,818 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 04:58:01,000 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 04:58:01,001 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash -581599920, now seen corresponding path program 21 times [2022-01-18 04:58:01,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:01,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360875006] [2022-01-18 04:58:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:01,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:01,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:01,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360875006] [2022-01-18 04:58:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360875006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:01,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999630445] [2022-01-18 04:58:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:01,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:01,072 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 04:58:01,072 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 04:58:01,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:01,280 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 04:58:01,304 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 04:58:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:01,411 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:01,411 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 49 treesize of output 40 [2022-01-18 04:58:01,432 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 04:58:01,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999630445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:01,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:01,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 04:58:01,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931085078] [2022-01-18 04:58:01,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:01,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:58:01,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:58:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:58:01,435 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 04:58:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:01,763 INFO L93 Difference]: Finished difference Result 598 states and 1752 transitions. [2022-01-18 04:58:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:01,763 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 04:58:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:01,765 INFO L225 Difference]: With dead ends: 598 [2022-01-18 04:58:01,765 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 04:58:01,765 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 04:58:01,766 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:01,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 143 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:58:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 04:58:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 385. [2022-01-18 04:58:01,772 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 04:58:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1195 transitions. [2022-01-18 04:58:01,773 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1195 transitions. Word has length 20 [2022-01-18 04:58:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1195 transitions. [2022-01-18 04:58:01,773 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 04:58:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1195 transitions. [2022-01-18 04:58:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:01,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:01,774 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 04:58:01,800 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 04:58:01,974 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 04:58:01,974 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1594292452, now seen corresponding path program 22 times [2022-01-18 04:58:01,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:01,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760587819] [2022-01-18 04:58:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:01,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:02,036 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 04:58:02,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760587819] [2022-01-18 04:58:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760587819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:02,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730069104] [2022-01-18 04:58:02,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:02,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:02,038 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 04:58:02,038 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 04:58:02,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:02,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:02,217 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 54 treesize of output 42 [2022-01-18 04:58:02,236 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 04:58:02,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:02,320 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:02,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:02,345 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 04:58:02,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730069104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:02,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:02,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 04:58:02,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737757597] [2022-01-18 04:58:02,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:02,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:58:02,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:58:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:58:02,346 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 04:58:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:02,637 INFO L93 Difference]: Finished difference Result 589 states and 1728 transitions. [2022-01-18 04:58:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:02,638 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 04:58:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:02,640 INFO L225 Difference]: With dead ends: 589 [2022-01-18 04:58:02,640 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 04:58:02,640 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 04:58:02,640 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 04:58:02,640 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 04:58:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 04:58:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 385. [2022-01-18 04:58:02,646 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 04:58:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1192 transitions. [2022-01-18 04:58:02,646 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1192 transitions. Word has length 20 [2022-01-18 04:58:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:02,646 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1192 transitions. [2022-01-18 04:58:02,647 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 04:58:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1192 transitions. [2022-01-18 04:58:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:02,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:02,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:02,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 04:58:02,851 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 04:58:02,851 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash 372704001, now seen corresponding path program 23 times [2022-01-18 04:58:02,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:02,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35480001] [2022-01-18 04:58:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:02,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:02,903 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 04:58:02,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:02,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35480001] [2022-01-18 04:58:02,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35480001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:02,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776985891] [2022-01-18 04:58:02,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:02,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:02,914 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 04:58:02,915 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 04:58:02,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:02,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:02,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:02,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:03,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:03,072 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 04:58:03,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:03,185 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:03,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:58:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:03,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776985891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:03,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:03,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 04:58:03,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047608965] [2022-01-18 04:58:03,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:03,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:58:03,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:58:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:58:03,192 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 04:58:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:03,471 INFO L93 Difference]: Finished difference Result 610 states and 1822 transitions. [2022-01-18 04:58:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:03,471 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 04:58:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:03,473 INFO L225 Difference]: With dead ends: 610 [2022-01-18 04:58:03,473 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 04:58:03,473 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 04:58:03,474 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 04:58:03,474 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 04:58:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 04:58:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 381. [2022-01-18 04:58:03,479 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 04:58:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 04:58:03,480 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 04:58:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:03,480 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 04:58:03,480 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 04:58:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 04:58:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:03,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:03,481 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 04:58:03,496 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 04:58:03,693 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 04:58:03,693 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1590856260, now seen corresponding path program 24 times [2022-01-18 04:58:03,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:03,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204743278] [2022-01-18 04:58:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:03,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:03,816 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 04:58:03,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204743278] [2022-01-18 04:58:03,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204743278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156689094] [2022-01-18 04:58:03,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:03,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:03,818 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 04:58:03,827 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 04:58:03,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:58:03,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:03,978 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 54 treesize of output 42 [2022-01-18 04:58:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:04,145 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:04,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:04,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156689094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:04,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:04,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:58:04,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907373651] [2022-01-18 04:58:04,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:04,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:58:04,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:58:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:58:04,166 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 04:58:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:04,602 INFO L93 Difference]: Finished difference Result 621 states and 1829 transitions. [2022-01-18 04:58:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:04,603 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 04:58:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:04,605 INFO L225 Difference]: With dead ends: 621 [2022-01-18 04:58:04,605 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 04:58:04,605 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 04:58:04,605 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 04:58:04,606 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 04:58:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 04:58:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 391. [2022-01-18 04:58:04,621 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 04:58:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1214 transitions. [2022-01-18 04:58:04,622 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1214 transitions. Word has length 20 [2022-01-18 04:58:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:04,622 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1214 transitions. [2022-01-18 04:58:04,622 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 04:58:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1214 transitions. [2022-01-18 04:58:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:04,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:04,623 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 04:58:04,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:04,838 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 04:58:04,838 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash -679229046, now seen corresponding path program 25 times [2022-01-18 04:58:04,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058265770] [2022-01-18 04:58:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:04,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:04,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058265770] [2022-01-18 04:58:04,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058265770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672446627] [2022-01-18 04:58:04,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:04,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:04,941 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 04:58:04,941 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 04:58:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:05,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:05,187 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 04:58:05,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:05,337 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:05,337 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 40 [2022-01-18 04:58:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:05,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672446627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:05,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:05,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:05,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322057718] [2022-01-18 04:58:05,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:05,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:05,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:05,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:05,357 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 04:58:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:05,830 INFO L93 Difference]: Finished difference Result 673 states and 1950 transitions. [2022-01-18 04:58:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:05,831 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 04:58:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:05,833 INFO L225 Difference]: With dead ends: 673 [2022-01-18 04:58:05,833 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 04:58:05,833 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 04:58:05,833 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 04:58:05,833 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 04:58:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 04:58:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 394. [2022-01-18 04:58:05,839 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 04:58:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1225 transitions. [2022-01-18 04:58:05,840 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1225 transitions. Word has length 20 [2022-01-18 04:58:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1225 transitions. [2022-01-18 04:58:05,840 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 04:58:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1225 transitions. [2022-01-18 04:58:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:05,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:05,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:05,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:06,056 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 04:58:06,056 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash 202848388, now seen corresponding path program 26 times [2022-01-18 04:58:06,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520978286] [2022-01-18 04:58:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:06,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:06,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520978286] [2022-01-18 04:58:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520978286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572181585] [2022-01-18 04:58:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:06,156 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 04:58:06,156 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 04:58:06,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:06,321 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 04:58:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:06,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:06,498 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:06,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:06,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572181585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:06,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:06,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:58:06,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435539937] [2022-01-18 04:58:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:06,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:58:06,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:58:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:58:06,523 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 04:58:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:06,911 INFO L93 Difference]: Finished difference Result 630 states and 1847 transitions. [2022-01-18 04:58:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:06,911 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 04:58:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:06,913 INFO L225 Difference]: With dead ends: 630 [2022-01-18 04:58:06,913 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 04:58:06,914 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 04:58:06,914 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 04:58:06,914 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 04:58:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 04:58:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 386. [2022-01-18 04:58:06,919 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 04:58:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1201 transitions. [2022-01-18 04:58:06,920 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1201 transitions. Word has length 20 [2022-01-18 04:58:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:06,920 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1201 transitions. [2022-01-18 04:58:06,920 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 04:58:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1201 transitions. [2022-01-18 04:58:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:06,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:06,921 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 04:58:06,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 04:58:07,136 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 04:58:07,136 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1185575312, now seen corresponding path program 27 times [2022-01-18 04:58:07,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:07,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129417805] [2022-01-18 04:58:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:07,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:07,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129417805] [2022-01-18 04:58:07,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129417805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289668609] [2022-01-18 04:58:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:07,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:07,233 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 04:58:07,233 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 04:58:07,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:07,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:07,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:07,648 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:07,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:07,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289668609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:07,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:07,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:07,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29390542] [2022-01-18 04:58:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:07,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:07,675 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 04:58:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:08,081 INFO L93 Difference]: Finished difference Result 599 states and 1763 transitions. [2022-01-18 04:58:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:08,081 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 04:58:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:08,083 INFO L225 Difference]: With dead ends: 599 [2022-01-18 04:58:08,083 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 04:58:08,083 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 04:58:08,084 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 04:58:08,084 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 04:58:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 04:58:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 392. [2022-01-18 04:58:08,089 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 04:58:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1223 transitions. [2022-01-18 04:58:08,090 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1223 transitions. Word has length 20 [2022-01-18 04:58:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:08,090 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1223 transitions. [2022-01-18 04:58:08,090 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 04:58:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1223 transitions. [2022-01-18 04:58:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:08,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:08,091 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 04:58:08,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:08,307 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 04:58:08,307 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash -303497878, now seen corresponding path program 28 times [2022-01-18 04:58:08,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193326314] [2022-01-18 04:58:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:08,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:08,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:08,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193326314] [2022-01-18 04:58:08,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193326314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:08,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334184199] [2022-01-18 04:58:08,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:08,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:08,404 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 04:58:08,405 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 04:58:08,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:08,607 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 65 treesize of output 51 [2022-01-18 04:58:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:08,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:08,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:08,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:08,833 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 04:58:08,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334184199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:08,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:08,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:08,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496399563] [2022-01-18 04:58:08,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:08,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:08,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:08,834 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 04:58:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:09,335 INFO L93 Difference]: Finished difference Result 605 states and 1770 transitions. [2022-01-18 04:58:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:09,335 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 04:58:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:09,337 INFO L225 Difference]: With dead ends: 605 [2022-01-18 04:58:09,337 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 04:58:09,337 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 04:58:09,338 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:58:09,338 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 04:58:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 04:58:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 389. [2022-01-18 04:58:09,343 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 04:58:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1212 transitions. [2022-01-18 04:58:09,344 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1212 transitions. Word has length 20 [2022-01-18 04:58:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:09,344 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1212 transitions. [2022-01-18 04:58:09,344 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 04:58:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1212 transitions. [2022-01-18 04:58:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:09,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:09,345 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:09,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 04:58:09,559 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 04:58:09,559 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -838727680, now seen corresponding path program 29 times [2022-01-18 04:58:09,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:09,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22145271] [2022-01-18 04:58:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:09,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:09,656 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 04:58:09,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22145271] [2022-01-18 04:58:09,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22145271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645651283] [2022-01-18 04:58:09,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:09,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:09,657 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 04:58:09,658 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 04:58:09,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:09,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:09,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:09,928 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 04:58:09,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:10,053 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:10,054 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 40 [2022-01-18 04:58:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:10,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645651283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:10,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:10,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:10,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071853525] [2022-01-18 04:58:10,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:10,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:10,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:10,085 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 04:58:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:10,558 INFO L93 Difference]: Finished difference Result 563 states and 1675 transitions. [2022-01-18 04:58:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:10,558 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 04:58:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:10,563 INFO L225 Difference]: With dead ends: 563 [2022-01-18 04:58:10,563 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 04:58:10,563 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 04:58:10,563 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 04:58:10,564 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 04:58:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 04:58:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 381. [2022-01-18 04:58:10,568 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 04:58:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 04:58:10,569 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 04:58:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:10,569 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 04:58:10,569 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 04:58:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 04:58:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:10,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:10,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:10,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 04:58:10,779 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 04:58:10,779 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2145298973, now seen corresponding path program 30 times [2022-01-18 04:58:10,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:10,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082432507] [2022-01-18 04:58:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:10,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:10,843 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 04:58:10,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082432507] [2022-01-18 04:58:10,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082432507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523691964] [2022-01-18 04:58:10,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:10,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:10,845 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 04:58:10,846 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 04:58:10,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:58:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:10,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:10,976 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 24 treesize of output 18 [2022-01-18 04:58:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:11,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:11,155 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:11,155 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 24 treesize of output 19 [2022-01-18 04:58:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:11,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523691964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:11,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:11,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 04:58:11,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330711942] [2022-01-18 04:58:11,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:11,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:58:11,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:11,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:58:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:58:11,161 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 04:58:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:11,425 INFO L93 Difference]: Finished difference Result 537 states and 1633 transitions. [2022-01-18 04:58:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:11,425 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 04:58:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:11,426 INFO L225 Difference]: With dead ends: 537 [2022-01-18 04:58:11,426 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 04:58:11,426 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 04:58:11,427 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 04:58:11,427 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 04:58:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 04:58:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2022-01-18 04:58:11,431 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 04:58:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1188 transitions. [2022-01-18 04:58:11,432 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1188 transitions. Word has length 20 [2022-01-18 04:58:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1188 transitions. [2022-01-18 04:58:11,432 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 04:58:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1188 transitions. [2022-01-18 04:58:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:11,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:11,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:11,449 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 04:58:11,643 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 04:58:11,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 628623098, now seen corresponding path program 31 times [2022-01-18 04:58:11,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:11,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848509716] [2022-01-18 04:58:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:11,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:11,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848509716] [2022-01-18 04:58:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848509716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795903732] [2022-01-18 04:58:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:11,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:11,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:11,770 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 04:58:11,807 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 04:58:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:11,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:12,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:12,176 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:12,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:12,203 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 04:58:12,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795903732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:12,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:12,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:58:12,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038686895] [2022-01-18 04:58:12,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:12,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:58:12,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:58:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:58:12,204 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 04:58:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:12,725 INFO L93 Difference]: Finished difference Result 746 states and 2167 transitions. [2022-01-18 04:58:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:12,726 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 04:58:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:12,727 INFO L225 Difference]: With dead ends: 746 [2022-01-18 04:58:12,727 INFO L226 Difference]: Without dead ends: 746 [2022-01-18 04:58:12,727 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 04:58:12,727 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 04:58:12,728 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 04:58:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-18 04:58:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 395. [2022-01-18 04:58:12,733 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 04:58:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1239 transitions. [2022-01-18 04:58:12,734 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1239 transitions. Word has length 20 [2022-01-18 04:58:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:12,734 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1239 transitions. [2022-01-18 04:58:12,734 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 04:58:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1239 transitions. [2022-01-18 04:58:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:12,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:12,735 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 04:58:12,752 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 04:58:12,935 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 04:58:12,936 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1641462208, now seen corresponding path program 32 times [2022-01-18 04:58:12,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:12,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025803480] [2022-01-18 04:58:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:12,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:13,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025803480] [2022-01-18 04:58:13,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025803480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577025964] [2022-01-18 04:58:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:13,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:13,031 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 04:58:13,032 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 04:58:13,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:13,185 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 72 treesize of output 56 [2022-01-18 04:58:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:13,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:13,447 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:13,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577025964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:13,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921523439] [2022-01-18 04:58:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:13,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:13,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:13,469 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 04:58:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:13,937 INFO L93 Difference]: Finished difference Result 798 states and 2288 transitions. [2022-01-18 04:58:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:13,938 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 04:58:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:13,939 INFO L225 Difference]: With dead ends: 798 [2022-01-18 04:58:13,939 INFO L226 Difference]: Without dead ends: 798 [2022-01-18 04:58:13,939 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 04:58:13,940 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 04:58:13,941 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 04:58:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-18 04:58:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 401. [2022-01-18 04:58:13,946 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 04:58:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1264 transitions. [2022-01-18 04:58:13,947 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1264 transitions. Word has length 20 [2022-01-18 04:58:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1264 transitions. [2022-01-18 04:58:13,947 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 04:58:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1264 transitions. [2022-01-18 04:58:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:13,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:13,948 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:13,963 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 04:58:14,148 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 04:58:14,149 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -759384774, now seen corresponding path program 33 times [2022-01-18 04:58:14,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:14,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269755998] [2022-01-18 04:58:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:14,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:14,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:14,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269755998] [2022-01-18 04:58:14,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269755998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:14,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083876947] [2022-01-18 04:58:14,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:14,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:14,244 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 04:58:14,273 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 04:58:14,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:14,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:14,405 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 75 treesize of output 59 [2022-01-18 04:58:14,535 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 04:58:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:14,651 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:14,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:14,676 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 04:58:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083876947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:14,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:14,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:58:14,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162935177] [2022-01-18 04:58:14,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:58:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:58:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:58:14,677 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 04:58:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:15,148 INFO L93 Difference]: Finished difference Result 755 states and 2179 transitions. [2022-01-18 04:58:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:15,148 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 04:58:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:15,149 INFO L225 Difference]: With dead ends: 755 [2022-01-18 04:58:15,149 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 04:58:15,149 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 04:58:15,150 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 04:58:15,150 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 04:58:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 04:58:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 399. [2022-01-18 04:58:15,156 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 04:58:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1253 transitions. [2022-01-18 04:58:15,157 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1253 transitions. Word has length 20 [2022-01-18 04:58:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1253 transitions. [2022-01-18 04:58:15,157 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 04:58:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1253 transitions. [2022-01-18 04:58:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:15,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:15,158 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 04:58:15,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 04:58:15,360 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 04:58:15,360 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1293154303, now seen corresponding path program 34 times [2022-01-18 04:58:15,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:15,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872285641] [2022-01-18 04:58:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:15,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:15,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872285641] [2022-01-18 04:58:15,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872285641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494682460] [2022-01-18 04:58:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:15,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:15,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:15,421 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 04:58:15,422 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 04:58:15,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:15,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:15,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:15,795 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:15,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:58:15,800 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 04:58:15,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494682460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:15,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:15,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 04:58:15,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370677479] [2022-01-18 04:58:15,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:15,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:58:15,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:58:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:58:15,803 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 04:58:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:16,083 INFO L93 Difference]: Finished difference Result 594 states and 1787 transitions. [2022-01-18 04:58:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:16,084 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 04:58:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:16,085 INFO L225 Difference]: With dead ends: 594 [2022-01-18 04:58:16,085 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 04:58:16,085 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 04:58:16,085 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 04:58:16,085 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 04:58:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 04:58:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 402. [2022-01-18 04:58:16,090 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 04:58:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1268 transitions. [2022-01-18 04:58:16,091 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1268 transitions. Word has length 20 [2022-01-18 04:58:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1268 transitions. [2022-01-18 04:58:16,091 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 04:58:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1268 transitions. [2022-01-18 04:58:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:16,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:16,092 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:16,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 04:58:16,293 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 04:58:16,293 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2121603972, now seen corresponding path program 35 times [2022-01-18 04:58:16,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:16,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581736116] [2022-01-18 04:58:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:16,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:16,429 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 04:58:16,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:16,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581736116] [2022-01-18 04:58:16,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581736116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:16,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878269855] [2022-01-18 04:58:16,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:16,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:16,430 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 04:58:16,431 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 04:58:16,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:58:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:16,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:16,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:16,690 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 04:58:16,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:16,816 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:16,816 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 40 [2022-01-18 04:58:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:16,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878269855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:16,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:16,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125740348] [2022-01-18 04:58:16,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:16,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:16,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:16,836 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 04:58:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:17,276 INFO L93 Difference]: Finished difference Result 709 states and 2075 transitions. [2022-01-18 04:58:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:17,276 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 04:58:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:17,278 INFO L225 Difference]: With dead ends: 709 [2022-01-18 04:58:17,278 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 04:58:17,278 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 04:58:17,278 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 04:58:17,278 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 04:58:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 04:58:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2022-01-18 04:58:17,284 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 04:58:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1223 transitions. [2022-01-18 04:58:17,285 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1223 transitions. Word has length 20 [2022-01-18 04:58:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1223 transitions. [2022-01-18 04:58:17,285 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 04:58:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1223 transitions. [2022-01-18 04:58:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:17,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:17,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:17,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 04:58:17,491 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 04:58:17,491 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -962204864, now seen corresponding path program 36 times [2022-01-18 04:58:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768950753] [2022-01-18 04:58:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:17,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:17,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768950753] [2022-01-18 04:58:17,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768950753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160415985] [2022-01-18 04:58:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:17,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:17,623 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 04:58:17,624 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 04:58:17,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:58:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:17,768 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 72 treesize of output 56 [2022-01-18 04:58:17,912 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 04:58:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:18,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:18,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160415985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:18,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:18,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:18,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637832031] [2022-01-18 04:58:18,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:18,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:18,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:18,088 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 04:58:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:18,724 INFO L93 Difference]: Finished difference Result 705 states and 2059 transitions. [2022-01-18 04:58:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:18,725 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 04:58:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:18,726 INFO L225 Difference]: With dead ends: 705 [2022-01-18 04:58:18,726 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 04:58:18,726 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 04:58:18,727 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 04:58:18,727 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 04:58:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 04:58:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 395. [2022-01-18 04:58:18,732 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 04:58:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1252 transitions. [2022-01-18 04:58:18,733 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1252 transitions. Word has length 20 [2022-01-18 04:58:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:18,733 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1252 transitions. [2022-01-18 04:58:18,733 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 04:58:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1252 transitions. [2022-01-18 04:58:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:18,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:18,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:18,752 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 04:58:18,941 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 04:58:18,941 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:18,942 INFO L85 PathProgramCache]: Analyzing trace with hash 311949990, now seen corresponding path program 37 times [2022-01-18 04:58:18,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808136104] [2022-01-18 04:58:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:18,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:19,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808136104] [2022-01-18 04:58:19,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808136104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156288444] [2022-01-18 04:58:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:19,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:19,058 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 04:58:19,059 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 04:58:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:19,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:19,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:19,338 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 04:58:19,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:19,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:19,481 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 40 [2022-01-18 04:58:19,500 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 04:58:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156288444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:19,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:19,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:19,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071134284] [2022-01-18 04:58:19,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:19,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:19,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:19,501 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 04:58:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:19,955 INFO L93 Difference]: Finished difference Result 643 states and 1916 transitions. [2022-01-18 04:58:19,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:19,955 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 04:58:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:19,956 INFO L225 Difference]: With dead ends: 643 [2022-01-18 04:58:19,956 INFO L226 Difference]: Without dead ends: 643 [2022-01-18 04:58:19,957 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 04:58:19,957 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 04:58:19,957 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 04:58:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-18 04:58:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 395. [2022-01-18 04:58:19,963 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 04:58:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1252 transitions. [2022-01-18 04:58:19,963 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1252 transitions. Word has length 20 [2022-01-18 04:58:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:19,964 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1252 transitions. [2022-01-18 04:58:19,964 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 04:58:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1252 transitions. [2022-01-18 04:58:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:19,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:19,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:19,980 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 04:58:20,165 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 04:58:20,165 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -305662691, now seen corresponding path program 38 times [2022-01-18 04:58:20,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:20,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471081006] [2022-01-18 04:58:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:20,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:20,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471081006] [2022-01-18 04:58:20,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471081006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174678760] [2022-01-18 04:58:20,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:20,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:20,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:20,237 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 04:58:20,237 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 04:58:20,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:20,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:20,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:20,364 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 04:58:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:20,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:20,562 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:20,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:58:20,567 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 04:58:20,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174678760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:20,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:20,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 04:58:20,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863500036] [2022-01-18 04:58:20,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:20,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:58:20,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:58:20,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:58:20,568 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 04:58:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:20,865 INFO L93 Difference]: Finished difference Result 506 states and 1539 transitions. [2022-01-18 04:58:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:20,865 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 04:58:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:20,866 INFO L225 Difference]: With dead ends: 506 [2022-01-18 04:58:20,866 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 04:58:20,866 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 04:58:20,866 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 04:58:20,867 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 04:58:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 04:58:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 386. [2022-01-18 04:58:20,871 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 04:58:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1211 transitions. [2022-01-18 04:58:20,872 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1211 transitions. Word has length 20 [2022-01-18 04:58:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:20,872 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1211 transitions. [2022-01-18 04:58:20,872 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 04:58:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1211 transitions. [2022-01-18 04:58:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:20,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:20,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:20,888 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 04:58:21,073 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 04:58:21,073 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -439149840, now seen corresponding path program 39 times [2022-01-18 04:58:21,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:21,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675229250] [2022-01-18 04:58:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:21,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:21,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675229250] [2022-01-18 04:58:21,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675229250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283449697] [2022-01-18 04:58:21,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:21,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:21,181 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 04:58:21,182 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 04:58:21,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:21,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:21,336 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 75 treesize of output 59 [2022-01-18 04:58:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:21,647 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:21,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:21,666 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 04:58:21,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283449697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:21,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:21,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:21,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142660397] [2022-01-18 04:58:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:21,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:21,667 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 04:58:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:22,161 INFO L93 Difference]: Finished difference Result 743 states and 2170 transitions. [2022-01-18 04:58:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:22,162 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 04:58:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:22,163 INFO L225 Difference]: With dead ends: 743 [2022-01-18 04:58:22,163 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 04:58:22,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:58:22,164 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 04:58:22,164 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 04:58:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 04:58:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 394. [2022-01-18 04:58:22,170 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 04:58:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1247 transitions. [2022-01-18 04:58:22,170 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1247 transitions. Word has length 20 [2022-01-18 04:58:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:22,171 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1247 transitions. [2022-01-18 04:58:22,171 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 04:58:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1247 transitions. [2022-01-18 04:58:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:22,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:22,171 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:22,187 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 04:58:22,372 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 04:58:22,372 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash 442927594, now seen corresponding path program 40 times [2022-01-18 04:58:22,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:22,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420085367] [2022-01-18 04:58:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:22,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:22,503 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 04:58:22,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420085367] [2022-01-18 04:58:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420085367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627846985] [2022-01-18 04:58:22,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:22,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:22,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:22,504 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 04:58:22,505 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 04:58:22,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:22,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:22,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:22,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:22,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:22,980 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:22,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:23,000 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 04:58:23,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627846985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:23,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:23,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:23,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558548180] [2022-01-18 04:58:23,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:23,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:23,001 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 04:58:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:23,653 INFO L93 Difference]: Finished difference Result 867 states and 2519 transitions. [2022-01-18 04:58:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:58:23,653 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 04:58:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:23,655 INFO L225 Difference]: With dead ends: 867 [2022-01-18 04:58:23,655 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 04:58:23,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 04:58:23,655 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 04:58:23,655 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 04:58:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 04:58:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 407. [2022-01-18 04:58:23,662 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 04:58:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1293 transitions. [2022-01-18 04:58:23,662 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1293 transitions. Word has length 20 [2022-01-18 04:58:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:23,663 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1293 transitions. [2022-01-18 04:58:23,663 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 04:58:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1293 transitions. [2022-01-18 04:58:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:23,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:23,663 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 04:58:23,679 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 04:58:23,864 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 04:58:23,864 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 301747494, now seen corresponding path program 41 times [2022-01-18 04:58:23,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967758733] [2022-01-18 04:58:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:23,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:23,992 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 04:58:23,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967758733] [2022-01-18 04:58:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967758733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231151770] [2022-01-18 04:58:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:23,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:23,993 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 04:58:23,994 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 04:58:24,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:58:24,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:24,143 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 75 treesize of output 59 [2022-01-18 04:58:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:24,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:24,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:24,437 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 04:58:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231151770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:24,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:24,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:24,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560813638] [2022-01-18 04:58:24,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:24,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:24,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:24,456 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 04:58:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:25,101 INFO L93 Difference]: Finished difference Result 790 states and 2291 transitions. [2022-01-18 04:58:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:25,101 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 04:58:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:25,103 INFO L225 Difference]: With dead ends: 790 [2022-01-18 04:58:25,103 INFO L226 Difference]: Without dead ends: 790 [2022-01-18 04:58:25,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:58:25,103 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 04:58:25,103 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 04:58:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-18 04:58:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 406. [2022-01-18 04:58:25,109 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 04:58:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1288 transitions. [2022-01-18 04:58:25,110 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1288 transitions. Word has length 20 [2022-01-18 04:58:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:25,110 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1288 transitions. [2022-01-18 04:58:25,110 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 04:58:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1288 transitions. [2022-01-18 04:58:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:25,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:25,111 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 04:58:25,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 04:58:25,315 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 04:58:25,315 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1296123114, now seen corresponding path program 42 times [2022-01-18 04:58:25,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:25,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258260650] [2022-01-18 04:58:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:25,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:25,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258260650] [2022-01-18 04:58:25,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258260650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713795619] [2022-01-18 04:58:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:25,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:25,448 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 04:58:25,449 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 04:58:25,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:58:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:25,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:25,740 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 04:58:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:25,892 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:25,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:25,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713795619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:25,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:25,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:25,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914465669] [2022-01-18 04:58:25,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:25,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:25,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:25,915 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 04:58:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:26,426 INFO L93 Difference]: Finished difference Result 724 states and 2143 transitions. [2022-01-18 04:58:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:26,426 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 04:58:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:26,427 INFO L225 Difference]: With dead ends: 724 [2022-01-18 04:58:26,427 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 04:58:26,428 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 04:58:26,428 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 04:58:26,428 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 04:58:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 04:58:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 403. [2022-01-18 04:58:26,434 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 04:58:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1273 transitions. [2022-01-18 04:58:26,435 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1273 transitions. Word has length 20 [2022-01-18 04:58:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:26,435 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1273 transitions. [2022-01-18 04:58:26,435 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 04:58:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1273 transitions. [2022-01-18 04:58:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:26,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:26,436 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:26,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:26,651 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 04:58:26,651 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2018391050, now seen corresponding path program 43 times [2022-01-18 04:58:26,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146487773] [2022-01-18 04:58:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:26,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:26,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146487773] [2022-01-18 04:58:26,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146487773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276753279] [2022-01-18 04:58:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:26,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:26,754 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 04:58:26,755 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 04:58:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:26,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:26,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:27,033 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 04:58:27,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:27,167 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:27,168 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 40 [2022-01-18 04:58:27,191 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 04:58:27,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276753279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:27,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:27,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:27,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757162174] [2022-01-18 04:58:27,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:27,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:27,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:27,192 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 04:58:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:27,832 INFO L93 Difference]: Finished difference Result 696 states and 2045 transitions. [2022-01-18 04:58:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:27,833 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 04:58:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:27,834 INFO L225 Difference]: With dead ends: 696 [2022-01-18 04:58:27,834 INFO L226 Difference]: Without dead ends: 690 [2022-01-18 04:58:27,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:58:27,835 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 04:58:27,835 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 04:58:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-18 04:58:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 407. [2022-01-18 04:58:27,841 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 04:58:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1287 transitions. [2022-01-18 04:58:27,842 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1287 transitions. Word has length 20 [2022-01-18 04:58:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:27,842 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1287 transitions. [2022-01-18 04:58:27,842 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 04:58:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1287 transitions. [2022-01-18 04:58:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:27,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:27,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:27,863 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 04:58:28,059 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 04:58:28,059 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1994491136, now seen corresponding path program 44 times [2022-01-18 04:58:28,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180167249] [2022-01-18 04:58:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:28,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:28,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180167249] [2022-01-18 04:58:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180167249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022562774] [2022-01-18 04:58:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:28,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:28,195 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 04:58:28,196 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 04:58:28,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:28,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:28,477 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 04:58:28,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:28,614 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:28,615 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 04:58:28,639 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 04:58:28,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022562774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:28,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:28,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:28,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272165062] [2022-01-18 04:58:28,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:28,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:28,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:28,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:28,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:28,640 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 04:58:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:29,073 INFO L93 Difference]: Finished difference Result 667 states and 1991 transitions. [2022-01-18 04:58:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:29,073 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 04:58:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:29,074 INFO L225 Difference]: With dead ends: 667 [2022-01-18 04:58:29,075 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 04:58:29,075 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 04:58:29,075 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 04:58:29,075 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 04:58:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 04:58:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 405. [2022-01-18 04:58:29,081 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 04:58:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1278 transitions. [2022-01-18 04:58:29,081 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1278 transitions. Word has length 20 [2022-01-18 04:58:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:29,082 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1278 transitions. [2022-01-18 04:58:29,082 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 04:58:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1278 transitions. [2022-01-18 04:58:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:29,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:29,082 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 04:58:29,098 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 04:58:29,287 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 04:58:29,287 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1726369728, now seen corresponding path program 45 times [2022-01-18 04:58:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107013275] [2022-01-18 04:58:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:29,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:29,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:29,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107013275] [2022-01-18 04:58:29,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107013275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984392924] [2022-01-18 04:58:29,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:29,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:29,428 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 04:58:29,428 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 04:58:29,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:29,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:29,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:29,970 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:29,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:29,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984392924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:29,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:29,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:29,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192656972] [2022-01-18 04:58:29,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:29,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:29,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:29,996 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 04:58:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:30,574 INFO L93 Difference]: Finished difference Result 626 states and 1879 transitions. [2022-01-18 04:58:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:30,574 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 04:58:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:30,575 INFO L225 Difference]: With dead ends: 626 [2022-01-18 04:58:30,576 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 04:58:30,576 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 04:58:30,576 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 04:58:30,576 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 04:58:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 04:58:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 412. [2022-01-18 04:58:30,583 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 04:58:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1305 transitions. [2022-01-18 04:58:30,584 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1305 transitions. Word has length 20 [2022-01-18 04:58:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1305 transitions. [2022-01-18 04:58:30,584 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 04:58:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1305 transitions. [2022-01-18 04:58:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:30,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:30,585 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 04:58:30,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:30,800 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 04:58:30,800 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1686520134, now seen corresponding path program 46 times [2022-01-18 04:58:30,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071187432] [2022-01-18 04:58:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:30,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:30,910 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 04:58:30,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071187432] [2022-01-18 04:58:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071187432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882831825] [2022-01-18 04:58:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:30,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:30,912 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 04:58:30,912 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 04:58:30,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:30,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:30,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:31,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:31,298 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 04:58:31,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:31,465 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:31,466 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 49 treesize of output 40 [2022-01-18 04:58:31,485 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 04:58:31,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882831825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:31,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:31,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502075254] [2022-01-18 04:58:31,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:31,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:31,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:31,486 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 04:58:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:32,070 INFO L93 Difference]: Finished difference Result 632 states and 1886 transitions. [2022-01-18 04:58:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:32,071 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 04:58:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:32,072 INFO L225 Difference]: With dead ends: 632 [2022-01-18 04:58:32,072 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 04:58:32,072 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 04:58:32,072 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 04:58:32,073 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 04:58:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 04:58:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 409. [2022-01-18 04:58:32,078 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 04:58:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1294 transitions. [2022-01-18 04:58:32,079 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1294 transitions. Word has length 20 [2022-01-18 04:58:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1294 transitions. [2022-01-18 04:58:32,079 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 04:58:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1294 transitions. [2022-01-18 04:58:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:32,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:32,080 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:32,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 04:58:32,295 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 04:58:32,296 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2073217360, now seen corresponding path program 47 times [2022-01-18 04:58:32,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:32,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465992726] [2022-01-18 04:58:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:32,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:32,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:32,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465992726] [2022-01-18 04:58:32,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465992726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:32,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043615135] [2022-01-18 04:58:32,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:32,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:32,400 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 04:58:32,401 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 04:58:32,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:32,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:32,739 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 04:58:32,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:32,890 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:32,890 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 04:58:32,910 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 04:58:32,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043615135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:32,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:32,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:32,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702953015] [2022-01-18 04:58:32,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:32,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:32,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:32,910 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 04:58:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:33,523 INFO L93 Difference]: Finished difference Result 596 states and 1804 transitions. [2022-01-18 04:58:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:33,524 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 04:58:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:33,525 INFO L225 Difference]: With dead ends: 596 [2022-01-18 04:58:33,525 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 04:58:33,526 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 04:58:33,526 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 04:58:33,526 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 04:58:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 04:58:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 406. [2022-01-18 04:58:33,531 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 04:58:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2022-01-18 04:58:33,532 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 20 [2022-01-18 04:58:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:33,532 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2022-01-18 04:58:33,532 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 04:58:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2022-01-18 04:58:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:33,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:33,533 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:33,549 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 04:58:33,733 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 04:58:33,734 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1075616694, now seen corresponding path program 48 times [2022-01-18 04:58:33,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:33,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170973215] [2022-01-18 04:58:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:33,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:33,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170973215] [2022-01-18 04:58:33,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170973215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224704572] [2022-01-18 04:58:33,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:33,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:33,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:33,869 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 04:58:33,870 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 04:58:33,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:58:33,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:33,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:34,143 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 90 treesize of output 72 [2022-01-18 04:58:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:34,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:34,466 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:34,466 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 49 treesize of output 40 [2022-01-18 04:58:34,485 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 04:58:34,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224704572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:34,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:34,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095882453] [2022-01-18 04:58:34,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:34,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:34,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:34,486 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 04:58:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:35,130 INFO L93 Difference]: Finished difference Result 710 states and 2089 transitions. [2022-01-18 04:58:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:35,131 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 04:58:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:35,132 INFO L225 Difference]: With dead ends: 710 [2022-01-18 04:58:35,132 INFO L226 Difference]: Without dead ends: 710 [2022-01-18 04:58:35,132 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 04:58:35,133 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 04:58:35,133 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 04:58:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-18 04:58:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 414. [2022-01-18 04:58:35,139 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 04:58:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1319 transitions. [2022-01-18 04:58:35,140 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1319 transitions. Word has length 20 [2022-01-18 04:58:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:35,140 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1319 transitions. [2022-01-18 04:58:35,140 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 04:58:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1319 transitions. [2022-01-18 04:58:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:35,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:35,141 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:35,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:35,347 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 04:58:35,347 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash -193539260, now seen corresponding path program 49 times [2022-01-18 04:58:35,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:35,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799645372] [2022-01-18 04:58:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:35,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:35,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799645372] [2022-01-18 04:58:35,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799645372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:35,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821134889] [2022-01-18 04:58:35,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:35,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:35,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:35,462 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 04:58:35,463 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 04:58:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:35,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:35,707 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 102 treesize of output 80 [2022-01-18 04:58:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:35,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:36,064 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:36,065 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 40 [2022-01-18 04:58:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821134889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:36,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:36,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:36,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767016312] [2022-01-18 04:58:36,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:36,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:36,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:36,090 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 04:58:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:36,782 INFO L93 Difference]: Finished difference Result 716 states and 2090 transitions. [2022-01-18 04:58:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:58:36,782 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 04:58:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:36,784 INFO L225 Difference]: With dead ends: 716 [2022-01-18 04:58:36,784 INFO L226 Difference]: Without dead ends: 710 [2022-01-18 04:58:36,785 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 04:58:36,785 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 04:58:36,785 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 04:58:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-18 04:58:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 411. [2022-01-18 04:58:36,791 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 04:58:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1308 transitions. [2022-01-18 04:58:36,792 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1308 transitions. Word has length 20 [2022-01-18 04:58:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:36,792 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1308 transitions. [2022-01-18 04:58:36,792 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 04:58:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1308 transitions. [2022-01-18 04:58:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:36,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:36,793 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 04:58:36,809 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 04:58:37,007 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 04:58:37,007 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -334719360, now seen corresponding path program 50 times [2022-01-18 04:58:37,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:37,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080451435] [2022-01-18 04:58:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:37,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:37,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:37,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080451435] [2022-01-18 04:58:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080451435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:37,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811445590] [2022-01-18 04:58:37,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:37,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:37,134 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 04:58:37,135 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 04:58:37,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:37,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:37,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:37,490 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 04:58:37,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:37,652 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:37,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811445590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:37,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:37,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:37,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306676523] [2022-01-18 04:58:37,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:37,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:37,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:37,671 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 04:58:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:38,299 INFO L93 Difference]: Finished difference Result 707 states and 2076 transitions. [2022-01-18 04:58:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:38,299 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 04:58:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:38,301 INFO L225 Difference]: With dead ends: 707 [2022-01-18 04:58:38,301 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 04:58:38,301 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 04:58:38,302 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 04:58:38,302 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 04:58:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 04:58:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 410. [2022-01-18 04:58:38,308 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 04:58:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1303 transitions. [2022-01-18 04:58:38,308 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1303 transitions. Word has length 20 [2022-01-18 04:58:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:38,309 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1303 transitions. [2022-01-18 04:58:38,309 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 04:58:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1303 transitions. [2022-01-18 04:58:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:38,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:38,309 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 04:58:38,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:38,523 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 04:58:38,523 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash 659656260, now seen corresponding path program 51 times [2022-01-18 04:58:38,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603043276] [2022-01-18 04:58:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:38,648 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 04:58:38,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603043276] [2022-01-18 04:58:38,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603043276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851708325] [2022-01-18 04:58:38,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:38,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:38,649 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 04:58:38,650 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 04:58:38,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:58:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 04:58:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:38,947 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 67 treesize of output 51 [2022-01-18 04:58:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:39,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:39,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:39,437 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 114 treesize of output 95 [2022-01-18 04:58:39,517 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 04:58:39,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851708325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:39,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:39,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 04:58:39,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696160639] [2022-01-18 04:58:39,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:39,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 04:58:39,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 04:58:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:58:39,518 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 04:58:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:40,185 INFO L93 Difference]: Finished difference Result 662 states and 1977 transitions. [2022-01-18 04:58:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:40,187 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 04:58:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:40,188 INFO L225 Difference]: With dead ends: 662 [2022-01-18 04:58:40,188 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 04:58:40,188 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 04:58:40,188 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 04:58:40,188 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 04:58:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 04:58:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 407. [2022-01-18 04:58:40,194 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 04:58:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1288 transitions. [2022-01-18 04:58:40,194 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1288 transitions. Word has length 20 [2022-01-18 04:58:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:40,195 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1288 transitions. [2022-01-18 04:58:40,195 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 04:58:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1288 transitions. [2022-01-18 04:58:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:40,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:40,195 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 04:58:40,211 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 04:58:40,411 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 04:58:40,411 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1640109392, now seen corresponding path program 52 times [2022-01-18 04:58:40,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065104951] [2022-01-18 04:58:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:40,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:40,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065104951] [2022-01-18 04:58:40,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065104951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143403104] [2022-01-18 04:58:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:40,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:40,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:40,542 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 04:58:40,543 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 04:58:40,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:40,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:40,884 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 04:58:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:41,020 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:41,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:41,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143403104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:41,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:41,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:58:41,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042031448] [2022-01-18 04:58:41,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:41,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:58:41,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:58:41,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:58:41,044 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 04:58:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:41,896 INFO L93 Difference]: Finished difference Result 684 states and 2017 transitions. [2022-01-18 04:58:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:58:41,896 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 04:58:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:41,897 INFO L225 Difference]: With dead ends: 684 [2022-01-18 04:58:41,897 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 04:58:41,898 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 04:58:41,898 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 04:58:41,898 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 04:58:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 04:58:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 411. [2022-01-18 04:58:41,903 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 04:58:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1302 transitions. [2022-01-18 04:58:41,904 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1302 transitions. Word has length 20 [2022-01-18 04:58:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:41,904 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1302 transitions. [2022-01-18 04:58:41,904 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 04:58:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1302 transitions. [2022-01-18 04:58:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:41,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:41,905 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:41,921 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 04:58:42,105 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 04:58:42,105 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1664009306, now seen corresponding path program 53 times [2022-01-18 04:58:42,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:42,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91533499] [2022-01-18 04:58:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:42,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:42,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91533499] [2022-01-18 04:58:42,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91533499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872571137] [2022-01-18 04:58:42,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:42,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:42,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:42,243 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 04:58:42,244 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 04:58:42,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:58:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:42,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:42,593 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 04:58:42,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:42,739 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:42,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:42,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872571137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:42,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:42,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543171589] [2022-01-18 04:58:42,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:42,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:42,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:42,758 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 04:58:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:43,362 INFO L93 Difference]: Finished difference Result 655 states and 1963 transitions. [2022-01-18 04:58:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:43,362 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 04:58:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:43,363 INFO L225 Difference]: With dead ends: 655 [2022-01-18 04:58:43,363 INFO L226 Difference]: Without dead ends: 655 [2022-01-18 04:58:43,364 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 04:58:43,364 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 04:58:43,364 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 04:58:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-18 04:58:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 406. [2022-01-18 04:58:43,369 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 04:58:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2022-01-18 04:58:43,370 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 20 [2022-01-18 04:58:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:43,370 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2022-01-18 04:58:43,370 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 04:58:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2022-01-18 04:58:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:43,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:43,371 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:43,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:43,571 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 04:58:43,571 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1213216572, now seen corresponding path program 54 times [2022-01-18 04:58:43,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009657077] [2022-01-18 04:58:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:43,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:43,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:43,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009657077] [2022-01-18 04:58:43,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009657077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:43,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993048850] [2022-01-18 04:58:43,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:43,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:43,649 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 04:58:43,650 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 04:58:43,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:58:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:43,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:43,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:44,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:44,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993048850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:44,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:44,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:58:44,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146511067] [2022-01-18 04:58:44,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:44,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:58:44,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:58:44,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:58:44,112 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 04:58:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:44,432 INFO L93 Difference]: Finished difference Result 587 states and 1780 transitions. [2022-01-18 04:58:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:44,433 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 04:58:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:44,433 INFO L225 Difference]: With dead ends: 587 [2022-01-18 04:58:44,433 INFO L226 Difference]: Without dead ends: 575 [2022-01-18 04:58:44,434 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 04:58:44,434 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 04:58:44,434 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 04:58:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-18 04:58:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 408. [2022-01-18 04:58:44,439 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 04:58:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2022-01-18 04:58:44,440 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 20 [2022-01-18 04:58:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:44,440 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2022-01-18 04:58:44,440 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 04:58:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2022-01-18 04:58:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:44,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:44,440 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 04:58:44,456 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 04:58:44,647 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 04:58:44,647 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash -472319238, now seen corresponding path program 55 times [2022-01-18 04:58:44,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911772756] [2022-01-18 04:58:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:44,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:44,747 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 04:58:44,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911772756] [2022-01-18 04:58:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911772756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652758540] [2022-01-18 04:58:44,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:44,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:44,749 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 04:58:44,767 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 04:58:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:45,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:45,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:45,214 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:45,214 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 40 [2022-01-18 04:58:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:45,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652758540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:45,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:45,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:58:45,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685303289] [2022-01-18 04:58:45,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:45,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:58:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:58:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:58:45,233 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 04:58:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:45,668 INFO L93 Difference]: Finished difference Result 612 states and 1832 transitions. [2022-01-18 04:58:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:45,668 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 04:58:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:45,669 INFO L225 Difference]: With dead ends: 612 [2022-01-18 04:58:45,669 INFO L226 Difference]: Without dead ends: 606 [2022-01-18 04:58:45,669 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 04:58:45,669 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:58:45,670 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 04:58:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-18 04:58:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 412. [2022-01-18 04:58:45,684 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 04:58:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1302 transitions. [2022-01-18 04:58:45,684 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1302 transitions. Word has length 20 [2022-01-18 04:58:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:45,684 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1302 transitions. [2022-01-18 04:58:45,684 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 04:58:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1302 transitions. [2022-01-18 04:58:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:45,685 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 04:58:45,701 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 04:58:45,887 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 04:58:45,887 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -448419324, now seen corresponding path program 56 times [2022-01-18 04:58:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73221737] [2022-01-18 04:58:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:45,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:46,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:46,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73221737] [2022-01-18 04:58:46,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73221737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:46,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401005238] [2022-01-18 04:58:46,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:46,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:46,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:46,008 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 04:58:46,009 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 04:58:46,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:46,301 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 72 treesize of output 56 [2022-01-18 04:58:46,376 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 04:58:46,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:46,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:46,529 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 40 [2022-01-18 04:58:46,547 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 04:58:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401005238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:46,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:46,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:46,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489084997] [2022-01-18 04:58:46,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:46,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:46,548 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 04:58:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:47,018 INFO L93 Difference]: Finished difference Result 583 states and 1778 transitions. [2022-01-18 04:58:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:47,018 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 04:58:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:47,019 INFO L225 Difference]: With dead ends: 583 [2022-01-18 04:58:47,019 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 04:58:47,019 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 04:58:47,020 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 04:58:47,020 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 04:58:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 04:58:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 408. [2022-01-18 04:58:47,024 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 04:58:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2022-01-18 04:58:47,025 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 20 [2022-01-18 04:58:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:47,025 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2022-01-18 04:58:47,025 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 04:58:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2022-01-18 04:58:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:47,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:47,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:47,042 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 04:58:47,242 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 04:58:47,242 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -852464528, now seen corresponding path program 57 times [2022-01-18 04:58:47,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:47,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498699941] [2022-01-18 04:58:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:47,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:47,348 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 04:58:47,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498699941] [2022-01-18 04:58:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498699941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:47,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588162321] [2022-01-18 04:58:47,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:47,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:47,349 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 04:58:47,351 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 04:58:47,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:47,667 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 72 treesize of output 56 [2022-01-18 04:58:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:47,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:47,936 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:47,936 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 40 [2022-01-18 04:58:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588162321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:47,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:47,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139727517] [2022-01-18 04:58:47,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:47,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:47,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:47,955 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 04:58:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:48,762 INFO L93 Difference]: Finished difference Result 780 states and 2322 transitions. [2022-01-18 04:58:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:48,762 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 04:58:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:48,763 INFO L225 Difference]: With dead ends: 780 [2022-01-18 04:58:48,763 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 04:58:48,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:58:48,764 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 04:58:48,764 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 04:58:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 04:58:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 418. [2022-01-18 04:58:48,770 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 04:58:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1326 transitions. [2022-01-18 04:58:48,770 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1326 transitions. Word has length 20 [2022-01-18 04:58:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:48,770 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1326 transitions. [2022-01-18 04:58:48,770 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 04:58:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1326 transitions. [2022-01-18 04:58:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:48,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:48,771 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:48,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 04:58:48,971 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 04:58:48,972 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 29612906, now seen corresponding path program 58 times [2022-01-18 04:58:48,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307598761] [2022-01-18 04:58:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:48,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:49,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307598761] [2022-01-18 04:58:49,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307598761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779128140] [2022-01-18 04:58:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:49,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:49,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:49,049 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 04:58:49,050 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 04:58:49,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:49,333 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 72 treesize of output 56 [2022-01-18 04:58:49,392 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 04:58:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:49,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:49,550 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 49 treesize of output 40 [2022-01-18 04:58:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:49,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779128140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:49,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:49,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:58:49,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610249519] [2022-01-18 04:58:49,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:49,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:58:49,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:58:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:58:49,572 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 04:58:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:50,273 INFO L93 Difference]: Finished difference Result 786 states and 2329 transitions. [2022-01-18 04:58:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:50,274 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 04:58:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:50,275 INFO L225 Difference]: With dead ends: 786 [2022-01-18 04:58:50,275 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 04:58:50,275 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 04:58:50,275 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 04:58:50,275 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 04:58:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 04:58:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 415. [2022-01-18 04:58:50,281 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 04:58:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1315 transitions. [2022-01-18 04:58:50,282 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1315 transitions. Word has length 20 [2022-01-18 04:58:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:50,282 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1315 transitions. [2022-01-18 04:58:50,282 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 04:58:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1315 transitions. [2022-01-18 04:58:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:50,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:50,282 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:50,298 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 04:58:50,483 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 04:58:50,483 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:50,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash -505616896, now seen corresponding path program 59 times [2022-01-18 04:58:50,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:50,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452645886] [2022-01-18 04:58:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:50,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:50,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452645886] [2022-01-18 04:58:50,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452645886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498097974] [2022-01-18 04:58:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:50,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:50,572 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 04:58:50,573 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 04:58:50,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:50,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:50,923 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 04:58:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:51,054 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:51,054 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 40 [2022-01-18 04:58:51,072 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 04:58:51,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498097974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:51,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:51,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:58:51,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808587827] [2022-01-18 04:58:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:51,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:58:51,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:58:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:58:51,073 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 04:58:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:51,615 INFO L93 Difference]: Finished difference Result 750 states and 2247 transitions. [2022-01-18 04:58:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:51,615 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 04:58:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:51,622 INFO L225 Difference]: With dead ends: 750 [2022-01-18 04:58:51,622 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 04:58:51,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:58:51,623 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 04:58:51,623 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 04:58:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 04:58:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 412. [2022-01-18 04:58:51,628 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 04:58:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1304 transitions. [2022-01-18 04:58:51,629 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1304 transitions. Word has length 20 [2022-01-18 04:58:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1304 transitions. [2022-01-18 04:58:51,629 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 04:58:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1304 transitions. [2022-01-18 04:58:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:51,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:51,630 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:51,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 04:58:51,830 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 04:58:51,830 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1518309428, now seen corresponding path program 60 times [2022-01-18 04:58:51,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:51,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082297474] [2022-01-18 04:58:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:51,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:51,917 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 04:58:51,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:51,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082297474] [2022-01-18 04:58:51,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082297474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:51,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070832179] [2022-01-18 04:58:51,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:58:51,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:51,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:51,920 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 04:58:51,920 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 04:58:51,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:58:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:51,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:52,192 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 54 treesize of output 42 [2022-01-18 04:58:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:52,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:52,376 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:52,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:52,394 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 04:58:52,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070832179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:52,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:52,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:58:52,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112409528] [2022-01-18 04:58:52,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:52,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:58:52,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:58:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:58:52,395 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 04:58:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:53,067 INFO L93 Difference]: Finished difference Result 782 states and 2307 transitions. [2022-01-18 04:58:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:53,067 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 04:58:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:53,068 INFO L225 Difference]: With dead ends: 782 [2022-01-18 04:58:53,068 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 04:58:53,068 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 04:58:53,069 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 04:58:53,069 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 04:58:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 04:58:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 409. [2022-01-18 04:58:53,074 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 04:58:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1293 transitions. [2022-01-18 04:58:53,075 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1293 transitions. Word has length 20 [2022-01-18 04:58:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:53,075 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1293 transitions. [2022-01-18 04:58:53,075 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 04:58:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1293 transitions. [2022-01-18 04:58:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:53,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:53,076 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 04:58:53,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 04:58:53,276 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 04:58:53,276 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1188876872, now seen corresponding path program 61 times [2022-01-18 04:58:53,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431411083] [2022-01-18 04:58:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:53,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:53,394 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 04:58:53,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431411083] [2022-01-18 04:58:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431411083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295542713] [2022-01-18 04:58:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:58:53,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:53,395 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 04:58:53,396 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 04:58:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:53,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:53,707 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 65 treesize of output 51 [2022-01-18 04:58:53,779 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 04:58:53,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:53,953 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:53,953 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 04:58:53,975 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 04:58:53,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295542713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:53,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:53,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:53,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413772142] [2022-01-18 04:58:53,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:53,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:53,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:53,976 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 04:58:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:54,683 INFO L93 Difference]: Finished difference Result 719 states and 2161 transitions. [2022-01-18 04:58:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:54,683 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 04:58:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:54,684 INFO L225 Difference]: With dead ends: 719 [2022-01-18 04:58:54,684 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 04:58:54,685 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 04:58:54,685 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 04:58:54,685 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 04:58:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 04:58:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 416. [2022-01-18 04:58:54,692 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 04:58:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1320 transitions. [2022-01-18 04:58:54,693 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1320 transitions. Word has length 20 [2022-01-18 04:58:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:54,693 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1320 transitions. [2022-01-18 04:58:54,693 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 04:58:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1320 transitions. [2022-01-18 04:58:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:54,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:54,694 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 04:58:54,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:54,910 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 04:58:54,910 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2070954306, now seen corresponding path program 62 times [2022-01-18 04:58:54,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:54,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148765209] [2022-01-18 04:58:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:54,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:54,994 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 04:58:54,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:54,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148765209] [2022-01-18 04:58:54,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148765209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:54,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337987075] [2022-01-18 04:58:54,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:58:54,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:54,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:54,995 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 04:58:55,022 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 04:58:55,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:55,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:55,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:55,325 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 72 treesize of output 56 [2022-01-18 04:58:55,388 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 04:58:55,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:55,538 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:55,538 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 40 [2022-01-18 04:58:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337987075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:55,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:55,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:58:55,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780778187] [2022-01-18 04:58:55,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:55,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:58:55,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:55,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:58:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:58:55,566 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 04:58:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:56,200 INFO L93 Difference]: Finished difference Result 725 states and 2168 transitions. [2022-01-18 04:58:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:58:56,200 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 04:58:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:56,201 INFO L225 Difference]: With dead ends: 725 [2022-01-18 04:58:56,201 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 04:58:56,201 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 04:58:56,201 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 04:58:56,202 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 04:58:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 04:58:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 413. [2022-01-18 04:58:56,207 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 04:58:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1309 transitions. [2022-01-18 04:58:56,208 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1309 transitions. Word has length 20 [2022-01-18 04:58:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:56,208 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1309 transitions. [2022-01-18 04:58:56,208 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 04:58:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1309 transitions. [2022-01-18 04:58:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:56,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:56,209 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:58:56,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:56,409 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 04:58:56,409 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1535724504, now seen corresponding path program 63 times [2022-01-18 04:58:56,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:56,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709652320] [2022-01-18 04:58:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:56,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:56,494 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 04:58:56,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709652320] [2022-01-18 04:58:56,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709652320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447865658] [2022-01-18 04:58:56,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:58:56,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:56,496 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 04:58:56,497 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 04:58:56,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:58:56,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:56,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:56,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:58:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:56,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:56,986 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:56,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:57,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447865658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:57,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:58:57,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969669975] [2022-01-18 04:58:57,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:57,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:58:57,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:58:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:58:57,005 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 04:58:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:57,472 INFO L93 Difference]: Finished difference Result 689 states and 2086 transitions. [2022-01-18 04:58:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:58:57,472 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 04:58:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:57,473 INFO L225 Difference]: With dead ends: 689 [2022-01-18 04:58:57,473 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 04:58:57,474 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 04:58:57,474 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 04:58:57,474 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 04:58:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 04:58:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 410. [2022-01-18 04:58:57,479 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 04:58:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1298 transitions. [2022-01-18 04:58:57,480 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1298 transitions. Word has length 20 [2022-01-18 04:58:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:57,480 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1298 transitions. [2022-01-18 04:58:57,480 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 04:58:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1298 transitions. [2022-01-18 04:58:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:57,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:57,481 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 04:58:57,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 04:58:57,687 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 04:58:57,687 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1613109550, now seen corresponding path program 64 times [2022-01-18 04:58:57,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818583056] [2022-01-18 04:58:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:57,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:57,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818583056] [2022-01-18 04:58:57,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818583056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112145906] [2022-01-18 04:58:57,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:58:57,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:57,817 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 04:58:57,843 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 04:58:57,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:58:57,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:58,070 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 90 treesize of output 72 [2022-01-18 04:58:58,176 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 04:58:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:58:58,358 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:58:58,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:58:58,377 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 04:58:58,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112145906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:58:58,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:58:58,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:58:58,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839160090] [2022-01-18 04:58:58,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:58:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:58:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:58:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:58:58,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:58:58,378 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 04:58:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:58:59,300 INFO L93 Difference]: Finished difference Result 794 states and 2346 transitions. [2022-01-18 04:58:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:58:59,300 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 04:58:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:58:59,301 INFO L225 Difference]: With dead ends: 794 [2022-01-18 04:58:59,301 INFO L226 Difference]: Without dead ends: 794 [2022-01-18 04:58:59,302 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 04:58:59,302 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 04:58:59,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 208 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 04:58:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-18 04:58:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 418. [2022-01-18 04:58:59,308 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 04:58:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1334 transitions. [2022-01-18 04:58:59,308 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1334 transitions. Word has length 20 [2022-01-18 04:58:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:58:59,309 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1334 transitions. [2022-01-18 04:58:59,309 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 04:58:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1334 transitions. [2022-01-18 04:58:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:58:59,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:58:59,309 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 04:58:59,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 04:58:59,510 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 04:58:59,510 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:58:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:58:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -731032116, now seen corresponding path program 65 times [2022-01-18 04:58:59,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:58:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275774747] [2022-01-18 04:58:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:58:59,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:58:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:58:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:59,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:58:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275774747] [2022-01-18 04:58:59,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275774747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:58:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862135271] [2022-01-18 04:58:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:58:59,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:58:59,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:58:59,619 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 04:58:59,620 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 04:58:59,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:58:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:58:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:58:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:58:59,871 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 90 treesize of output 72 [2022-01-18 04:58:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:58:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:00,141 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:00,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:00,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862135271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:00,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:00,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:00,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216424243] [2022-01-18 04:59:00,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:00,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:00,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:00,162 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 04:59:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:01,237 INFO L93 Difference]: Finished difference Result 800 states and 2347 transitions. [2022-01-18 04:59:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:59:01,237 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 04:59:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:01,238 INFO L225 Difference]: With dead ends: 800 [2022-01-18 04:59:01,238 INFO L226 Difference]: Without dead ends: 794 [2022-01-18 04:59:01,239 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 04:59:01,239 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 04:59:01,239 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 04:59:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-18 04:59:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 415. [2022-01-18 04:59:01,245 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 04:59:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1323 transitions. [2022-01-18 04:59:01,245 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1323 transitions. Word has length 20 [2022-01-18 04:59:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:01,246 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1323 transitions. [2022-01-18 04:59:01,246 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 04:59:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1323 transitions. [2022-01-18 04:59:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:01,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:01,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:01,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:01,447 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 04:59:01,447 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -872212216, now seen corresponding path program 66 times [2022-01-18 04:59:01,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586907720] [2022-01-18 04:59:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:01,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:01,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586907720] [2022-01-18 04:59:01,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586907720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283673980] [2022-01-18 04:59:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:01,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:01,563 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 04:59:01,563 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 04:59:01,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:01,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:01,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:01,810 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 90 treesize of output 72 [2022-01-18 04:59:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:02,117 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:02,117 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 40 [2022-01-18 04:59:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:02,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283673980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:02,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:02,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:59:02,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281638483] [2022-01-18 04:59:02,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:02,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:59:02,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:59:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:59:02,145 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 04:59:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:02,825 INFO L93 Difference]: Finished difference Result 762 states and 2267 transitions. [2022-01-18 04:59:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:02,825 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 04:59:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:02,826 INFO L225 Difference]: With dead ends: 762 [2022-01-18 04:59:02,826 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 04:59:02,826 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 04:59:02,827 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 04:59:02,827 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 04:59:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 04:59:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 414. [2022-01-18 04:59:02,832 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 04:59:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1318 transitions. [2022-01-18 04:59:02,833 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1318 transitions. Word has length 20 [2022-01-18 04:59:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:02,833 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1318 transitions. [2022-01-18 04:59:02,833 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 04:59:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1318 transitions. [2022-01-18 04:59:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:02,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:02,834 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 04:59:02,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:03,050 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 04:59:03,050 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash 122163404, now seen corresponding path program 67 times [2022-01-18 04:59:03,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529254370] [2022-01-18 04:59:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:03,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:03,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529254370] [2022-01-18 04:59:03,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529254370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119798496] [2022-01-18 04:59:03,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:03,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:03,189 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 04:59:03,190 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 04:59:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:03,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:03,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:03,723 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:03,724 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 04:59:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:03,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119798496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:03,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:03,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:59:03,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094273971] [2022-01-18 04:59:03,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:03,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:59:03,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:59:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:59:03,742 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 04:59:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:04,368 INFO L93 Difference]: Finished difference Result 725 states and 2185 transitions. [2022-01-18 04:59:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:04,368 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 04:59:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:04,369 INFO L225 Difference]: With dead ends: 725 [2022-01-18 04:59:04,369 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 04:59:04,369 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 04:59:04,370 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 04:59:04,370 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 04:59:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 04:59:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 411. [2022-01-18 04:59:04,375 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 04:59:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1303 transitions. [2022-01-18 04:59:04,376 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1303 transitions. Word has length 20 [2022-01-18 04:59:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:04,376 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1303 transitions. [2022-01-18 04:59:04,376 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 04:59:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1303 transitions. [2022-01-18 04:59:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:04,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:04,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:04,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:04,577 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 04:59:04,577 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1102616536, now seen corresponding path program 68 times [2022-01-18 04:59:04,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:04,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800850587] [2022-01-18 04:59:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:04,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:04,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800850587] [2022-01-18 04:59:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800850587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84222798] [2022-01-18 04:59:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:04,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:04,717 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 04:59:04,728 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 04:59:04,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:04,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:04,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:05,064 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 04:59:05,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:05,213 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:05,213 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 40 [2022-01-18 04:59:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:05,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84222798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:05,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:05,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:05,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138390606] [2022-01-18 04:59:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:05,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:05,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:05,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:05,233 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 04:59:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:06,256 INFO L93 Difference]: Finished difference Result 762 states and 2259 transitions. [2022-01-18 04:59:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:59:06,257 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 04:59:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:06,258 INFO L225 Difference]: With dead ends: 762 [2022-01-18 04:59:06,258 INFO L226 Difference]: Without dead ends: 756 [2022-01-18 04:59:06,258 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 04:59:06,258 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 04:59:06,258 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 04:59:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-01-18 04:59:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 415. [2022-01-18 04:59:06,264 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 04:59:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1317 transitions. [2022-01-18 04:59:06,264 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1317 transitions. Word has length 20 [2022-01-18 04:59:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:06,264 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1317 transitions. [2022-01-18 04:59:06,264 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 04:59:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1317 transitions. [2022-01-18 04:59:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:06,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:06,265 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:06,465 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 04:59:06,466 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1126516450, now seen corresponding path program 69 times [2022-01-18 04:59:06,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:06,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597689329] [2022-01-18 04:59:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:06,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:06,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597689329] [2022-01-18 04:59:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597689329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423377347] [2022-01-18 04:59:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:06,589 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 04:59:06,590 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 04:59:06,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:06,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:06,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:06,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:07,041 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 04:59:07,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:07,208 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:07,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:07,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423377347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:07,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:07,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 04:59:07,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032740116] [2022-01-18 04:59:07,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:07,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 04:59:07,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 04:59:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:59:07,232 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 04:59:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:08,116 INFO L93 Difference]: Finished difference Result 739 states and 2220 transitions. [2022-01-18 04:59:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:08,116 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 04:59:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:08,117 INFO L225 Difference]: With dead ends: 739 [2022-01-18 04:59:08,117 INFO L226 Difference]: Without dead ends: 739 [2022-01-18 04:59:08,117 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 04:59:08,117 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 04:59:08,118 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 04:59:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-18 04:59:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 410. [2022-01-18 04:59:08,123 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 04:59:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1298 transitions. [2022-01-18 04:59:08,124 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1298 transitions. Word has length 20 [2022-01-18 04:59:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1298 transitions. [2022-01-18 04:59:08,124 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 04:59:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1298 transitions. [2022-01-18 04:59:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:08,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:08,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:08,141 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 04:59:08,325 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 04:59:08,325 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1750709428, now seen corresponding path program 70 times [2022-01-18 04:59:08,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:08,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837324919] [2022-01-18 04:59:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:08,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:08,423 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 04:59:08,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837324919] [2022-01-18 04:59:08,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837324919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784371923] [2022-01-18 04:59:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:08,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:08,425 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 04:59:08,425 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 04:59:08,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:08,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:08,785 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 04:59:08,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:08,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:08,930 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 49 treesize of output 40 [2022-01-18 04:59:08,952 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 04:59:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784371923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:08,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:08,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301267387] [2022-01-18 04:59:08,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:08,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:08,954 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 04:59:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:09,595 INFO L93 Difference]: Finished difference Result 681 states and 2064 transitions. [2022-01-18 04:59:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:09,595 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 04:59:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:09,596 INFO L225 Difference]: With dead ends: 681 [2022-01-18 04:59:09,596 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 04:59:09,596 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 04:59:09,596 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 04:59:09,596 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 04:59:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 04:59:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 412. [2022-01-18 04:59:09,601 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 04:59:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1303 transitions. [2022-01-18 04:59:09,602 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1303 transitions. Word has length 20 [2022-01-18 04:59:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:09,602 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1303 transitions. [2022-01-18 04:59:09,602 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 04:59:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1303 transitions. [2022-01-18 04:59:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:09,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:09,603 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 04:59:09,618 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 04:59:09,811 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 04:59:09,811 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1009812094, now seen corresponding path program 71 times [2022-01-18 04:59:09,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:09,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414792832] [2022-01-18 04:59:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:09,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:09,900 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 04:59:09,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414792832] [2022-01-18 04:59:09,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414792832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446403473] [2022-01-18 04:59:09,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:09,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:09,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:09,902 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 04:59:09,903 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 04:59:09,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:10,181 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 75 treesize of output 59 [2022-01-18 04:59:10,252 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 04:59:10,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:10,399 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:10,399 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 40 [2022-01-18 04:59:10,418 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 04:59:10,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446403473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:10,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:10,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:59:10,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597129823] [2022-01-18 04:59:10,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:10,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:59:10,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:59:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:59:10,420 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 04:59:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:11,045 INFO L93 Difference]: Finished difference Result 706 states and 2116 transitions. [2022-01-18 04:59:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:11,045 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 04:59:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:11,046 INFO L225 Difference]: With dead ends: 706 [2022-01-18 04:59:11,046 INFO L226 Difference]: Without dead ends: 700 [2022-01-18 04:59:11,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-01-18 04:59:11,046 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 04:59:11,046 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 04:59:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-18 04:59:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 416. [2022-01-18 04:59:11,052 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 04:59:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1317 transitions. [2022-01-18 04:59:11,052 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1317 transitions. Word has length 20 [2022-01-18 04:59:11,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:11,052 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1317 transitions. [2022-01-18 04:59:11,052 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 04:59:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1317 transitions. [2022-01-18 04:59:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:11,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:11,053 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:11,069 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 04:59:11,253 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 04:59:11,254 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash -985912180, now seen corresponding path program 72 times [2022-01-18 04:59:11,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:11,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648300137] [2022-01-18 04:59:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:11,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:11,364 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 04:59:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:11,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648300137] [2022-01-18 04:59:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648300137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:11,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771085562] [2022-01-18 04:59:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:11,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:11,365 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 04:59:11,367 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 04:59:11,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:11,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:11,761 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 04:59:11,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:11,903 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:11,903 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 49 treesize of output 40 [2022-01-18 04:59:11,921 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 04:59:11,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771085562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:11,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:59:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901664301] [2022-01-18 04:59:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:11,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:11,922 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 04:59:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:12,366 INFO L93 Difference]: Finished difference Result 677 states and 2062 transitions. [2022-01-18 04:59:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:12,366 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 04:59:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:12,367 INFO L225 Difference]: With dead ends: 677 [2022-01-18 04:59:12,367 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 04:59:12,367 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 04:59:12,368 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 04:59:12,368 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 04:59:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 04:59:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2022-01-18 04:59:12,373 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 04:59:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1293 transitions. [2022-01-18 04:59:12,373 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1293 transitions. Word has length 20 [2022-01-18 04:59:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:12,374 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1293 transitions. [2022-01-18 04:59:12,374 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 04:59:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1293 transitions. [2022-01-18 04:59:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:12,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:12,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:12,390 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 04:59:12,575 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 04:59:12,575 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -318546216, now seen corresponding path program 73 times [2022-01-18 04:59:12,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:12,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573931950] [2022-01-18 04:59:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:12,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:12,662 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 04:59:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573931950] [2022-01-18 04:59:12,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573931950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986831553] [2022-01-18 04:59:12,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:12,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:12,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:12,663 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 04:59:12,664 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 04:59:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:12,932 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 04:59:12,952 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 04:59:12,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:13,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:13,050 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 49 treesize of output 40 [2022-01-18 04:59:13,069 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 04:59:13,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986831553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:13,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:13,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 04:59:13,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838860684] [2022-01-18 04:59:13,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 04:59:13,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 04:59:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 04:59:13,070 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 04:59:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:13,434 INFO L93 Difference]: Finished difference Result 704 states and 2102 transitions. [2022-01-18 04:59:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:13,434 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 04:59:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:13,435 INFO L225 Difference]: With dead ends: 704 [2022-01-18 04:59:13,435 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 04:59:13,435 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 04:59:13,436 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 04:59:13,436 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 04:59:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 04:59:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 411. [2022-01-18 04:59:13,441 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 04:59:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 04:59:13,442 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 04:59:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:13,442 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 04:59:13,442 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 04:59:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 04:59:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:13,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:13,442 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:13,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 04:59:13,643 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 04:59:13,643 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1271324160, now seen corresponding path program 74 times [2022-01-18 04:59:13,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:13,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856331370] [2022-01-18 04:59:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:13,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:13,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856331370] [2022-01-18 04:59:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856331370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661146646] [2022-01-18 04:59:13,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:13,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:13,732 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 04:59:13,732 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 04:59:13,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:13,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:13,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:14,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:14,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:14,144 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:14,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:14,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661146646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:14,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:14,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 04:59:14,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395190403] [2022-01-18 04:59:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:14,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:59:14,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:59:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:59:14,163 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 04:59:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:14,573 INFO L93 Difference]: Finished difference Result 663 states and 2016 transitions. [2022-01-18 04:59:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:14,573 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 04:59:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:14,574 INFO L225 Difference]: With dead ends: 663 [2022-01-18 04:59:14,574 INFO L226 Difference]: Without dead ends: 651 [2022-01-18 04:59:14,574 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 04:59:14,574 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 04:59:14,575 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 04:59:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-01-18 04:59:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 413. [2022-01-18 04:59:14,579 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 04:59:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1303 transitions. [2022-01-18 04:59:14,580 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1303 transitions. Word has length 20 [2022-01-18 04:59:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:14,580 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1303 transitions. [2022-01-18 04:59:14,580 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 04:59:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1303 transitions. [2022-01-18 04:59:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:14,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:14,581 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 04:59:14,597 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 04:59:14,781 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 04:59:14,782 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2012221494, now seen corresponding path program 75 times [2022-01-18 04:59:14,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:14,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61494905] [2022-01-18 04:59:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:14,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:14,882 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 04:59:14,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:14,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61494905] [2022-01-18 04:59:14,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61494905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:14,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66348240] [2022-01-18 04:59:14,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:14,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:14,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:14,883 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 04:59:14,884 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 04:59:14,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:59:14,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:15,145 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 75 treesize of output 59 [2022-01-18 04:59:15,221 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 04:59:15,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:15,356 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:15,357 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 40 [2022-01-18 04:59:15,395 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 04:59:15,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66348240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:15,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:15,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:15,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65297544] [2022-01-18 04:59:15,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:15,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:15,396 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 04:59:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:16,153 INFO L93 Difference]: Finished difference Result 686 states and 2061 transitions. [2022-01-18 04:59:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:16,154 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 04:59:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:16,155 INFO L225 Difference]: With dead ends: 686 [2022-01-18 04:59:16,155 INFO L226 Difference]: Without dead ends: 680 [2022-01-18 04:59:16,155 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 04:59:16,155 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 04:59:16,155 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 04:59:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-18 04:59:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 417. [2022-01-18 04:59:16,160 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 04:59:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1317 transitions. [2022-01-18 04:59:16,161 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1317 transitions. Word has length 20 [2022-01-18 04:59:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:16,161 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1317 transitions. [2022-01-18 04:59:16,161 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 04:59:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1317 transitions. [2022-01-18 04:59:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:16,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:16,162 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 04:59:16,178 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 04:59:16,362 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 04:59:16,363 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2036121408, now seen corresponding path program 76 times [2022-01-18 04:59:16,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:16,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933869909] [2022-01-18 04:59:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:16,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:16,448 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 04:59:16,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933869909] [2022-01-18 04:59:16,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933869909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622008701] [2022-01-18 04:59:16,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:16,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:16,449 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 04:59:16,450 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 04:59:16,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:16,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:16,791 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 04:59:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:16,925 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 04:59:16,925 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 49 treesize of output 40 [2022-01-18 04:59:16,948 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 04:59:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622008701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:16,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:16,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 04:59:16,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529859166] [2022-01-18 04:59:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:16,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:16,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:16,949 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 04:59:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:17,347 INFO L93 Difference]: Finished difference Result 657 states and 2007 transitions. [2022-01-18 04:59:17,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:17,348 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 04:59:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:17,349 INFO L225 Difference]: With dead ends: 657 [2022-01-18 04:59:17,349 INFO L226 Difference]: Without dead ends: 657 [2022-01-18 04:59:17,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:59:17,349 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 04:59:17,349 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 04:59:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-18 04:59:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 411. [2022-01-18 04:59:17,354 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 04:59:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 04:59:17,355 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 04:59:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:17,355 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 04:59:17,355 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 04:59:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 04:59:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:17,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:17,356 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:17,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 04:59:17,556 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 04:59:17,556 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1849651584, now seen corresponding path program 77 times [2022-01-18 04:59:17,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998861696] [2022-01-18 04:59:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:17,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:17,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998861696] [2022-01-18 04:59:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998861696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793975489] [2022-01-18 04:59:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:17,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:17,679 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 04:59:17,679 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 04:59:17,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:17,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:17,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:18,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:18,010 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 45 [2022-01-18 04:59:18,072 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 04:59:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793975489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:18,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:18,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:18,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316938627] [2022-01-18 04:59:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:18,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:18,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:18,073 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 04:59:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:18,390 INFO L93 Difference]: Finished difference Result 514 states and 1562 transitions. [2022-01-18 04:59:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:18,390 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 04:59:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:18,391 INFO L225 Difference]: With dead ends: 514 [2022-01-18 04:59:18,391 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 04:59:18,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:59:18,391 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 04:59:18,391 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 04:59:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 04:59:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 421. [2022-01-18 04:59:18,396 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 04:59:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1324 transitions. [2022-01-18 04:59:18,397 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1324 transitions. Word has length 20 [2022-01-18 04:59:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:18,397 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1324 transitions. [2022-01-18 04:59:18,397 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 04:59:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1324 transitions. [2022-01-18 04:59:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:18,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:18,398 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 04:59:18,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 04:59:18,598 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 04:59:18,598 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:18,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -420433722, now seen corresponding path program 78 times [2022-01-18 04:59:18,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107520736] [2022-01-18 04:59:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:18,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:18,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107520736] [2022-01-18 04:59:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107520736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641138336] [2022-01-18 04:59:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:18,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:18,687 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 04:59:18,688 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 04:59:18,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:59:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:18,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:18,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:18,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:18,924 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 04:59:18,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:19,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:19,022 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 49 treesize of output 45 [2022-01-18 04:59:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641138336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:19,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:19,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:19,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803020442] [2022-01-18 04:59:19,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:19,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:19,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:19,104 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 04:59:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:19,382 INFO L93 Difference]: Finished difference Result 566 states and 1683 transitions. [2022-01-18 04:59:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:19,383 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 04:59:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:19,384 INFO L225 Difference]: With dead ends: 566 [2022-01-18 04:59:19,384 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 04:59:19,384 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 04:59:19,384 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 04:59:19,384 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 04:59:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 04:59:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 424. [2022-01-18 04:59:19,389 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 04:59:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1335 transitions. [2022-01-18 04:59:19,389 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1335 transitions. Word has length 20 [2022-01-18 04:59:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:19,390 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1335 transitions. [2022-01-18 04:59:19,390 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 04:59:19,390 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1335 transitions. [2022-01-18 04:59:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:19,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:19,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:19,406 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 04:59:19,591 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 04:59:19,591 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash 461643712, now seen corresponding path program 79 times [2022-01-18 04:59:19,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345149745] [2022-01-18 04:59:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:19,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:19,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345149745] [2022-01-18 04:59:19,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345149745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:19,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409314962] [2022-01-18 04:59:19,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:19,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:19,678 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 04:59:19,678 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 04:59:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:19,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:19,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:19,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:20,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:20,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:20,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409314962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:20,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:20,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 04:59:20,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595180866] [2022-01-18 04:59:20,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:20,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:59:20,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:59:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:59:20,064 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 04:59:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:20,341 INFO L93 Difference]: Finished difference Result 523 states and 1580 transitions. [2022-01-18 04:59:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:20,341 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 04:59:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:20,342 INFO L225 Difference]: With dead ends: 523 [2022-01-18 04:59:20,342 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 04:59:20,342 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 04:59:20,342 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:59:20,342 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 04:59:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 04:59:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 416. [2022-01-18 04:59:20,347 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 04:59:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1311 transitions. [2022-01-18 04:59:20,348 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1311 transitions. Word has length 20 [2022-01-18 04:59:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:20,348 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1311 transitions. [2022-01-18 04:59:20,348 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 04:59:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1311 transitions. [2022-01-18 04:59:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:20,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:20,348 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:20,364 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 04:59:20,549 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 04:59:20,549 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -926779988, now seen corresponding path program 80 times [2022-01-18 04:59:20,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:20,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926620617] [2022-01-18 04:59:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:20,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:20,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926620617] [2022-01-18 04:59:20,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926620617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446618239] [2022-01-18 04:59:20,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:20,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:20,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:20,653 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 04:59:20,654 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 04:59:20,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:20,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:20,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:21,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:21,052 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 49 treesize of output 45 [2022-01-18 04:59:21,117 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 04:59:21,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446618239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:21,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:21,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:21,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834311278] [2022-01-18 04:59:21,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:21,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:21,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:21,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:21,118 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 04:59:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:21,420 INFO L93 Difference]: Finished difference Result 492 states and 1496 transitions. [2022-01-18 04:59:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:21,420 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 04:59:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:21,421 INFO L225 Difference]: With dead ends: 492 [2022-01-18 04:59:21,421 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 04:59:21,421 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 04:59:21,421 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 04:59:21,421 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 04:59:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 04:59:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 422. [2022-01-18 04:59:21,432 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 04:59:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1333 transitions. [2022-01-18 04:59:21,432 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1333 transitions. Word has length 20 [2022-01-18 04:59:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:21,432 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1333 transitions. [2022-01-18 04:59:21,433 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 04:59:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1333 transitions. [2022-01-18 04:59:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:21,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:21,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:21,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 04:59:21,634 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 04:59:21,634 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -44702554, now seen corresponding path program 81 times [2022-01-18 04:59:21,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:21,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054888934] [2022-01-18 04:59:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:21,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:21,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054888934] [2022-01-18 04:59:21,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054888934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060135682] [2022-01-18 04:59:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:21,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:21,716 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 04:59:21,717 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 04:59:21,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:59:21,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:21,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:21,926 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 65 treesize of output 51 [2022-01-18 04:59:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:22,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:22,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:22,148 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 04:59:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060135682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:22,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:22,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:22,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000734751] [2022-01-18 04:59:22,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:22,149 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 04:59:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:22,547 INFO L93 Difference]: Finished difference Result 498 states and 1503 transitions. [2022-01-18 04:59:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:59:22,547 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 04:59:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:22,548 INFO L225 Difference]: With dead ends: 498 [2022-01-18 04:59:22,548 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 04:59:22,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:59:22,548 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 04:59:22,548 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 04:59:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 04:59:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 419. [2022-01-18 04:59:22,552 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 04:59:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1322 transitions. [2022-01-18 04:59:22,553 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1322 transitions. Word has length 20 [2022-01-18 04:59:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1322 transitions. [2022-01-18 04:59:22,553 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 04:59:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1322 transitions. [2022-01-18 04:59:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:22,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:22,554 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:22,570 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 04:59:22,754 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 04:59:22,755 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash -579932356, now seen corresponding path program 82 times [2022-01-18 04:59:22,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:22,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841076922] [2022-01-18 04:59:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:22,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:22,830 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 04:59:22,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841076922] [2022-01-18 04:59:22,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841076922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998805351] [2022-01-18 04:59:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:22,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:22,831 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 04:59:22,831 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 04:59:22,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:22,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:23,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:23,099 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 04:59:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:23,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:23,199 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 49 treesize of output 45 [2022-01-18 04:59:23,258 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 04:59:23,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998805351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:23,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:23,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:23,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647149163] [2022-01-18 04:59:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:23,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:23,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:23,259 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 04:59:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:23,632 INFO L93 Difference]: Finished difference Result 456 states and 1408 transitions. [2022-01-18 04:59:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:23,632 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 04:59:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:23,633 INFO L225 Difference]: With dead ends: 456 [2022-01-18 04:59:23,633 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 04:59:23,633 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 04:59:23,634 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 04:59:23,634 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 04:59:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 04:59:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 411. [2022-01-18 04:59:23,638 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 04:59:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1298 transitions. [2022-01-18 04:59:23,638 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1298 transitions. Word has length 20 [2022-01-18 04:59:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:23,639 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1298 transitions. [2022-01-18 04:59:23,639 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 04:59:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1298 transitions. [2022-01-18 04:59:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:23,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:23,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:23,655 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 04:59:23,855 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 04:59:23,855 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1890872999, now seen corresponding path program 83 times [2022-01-18 04:59:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207909169] [2022-01-18 04:59:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:23,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:23,903 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 04:59:23,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207909169] [2022-01-18 04:59:23,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207909169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125562210] [2022-01-18 04:59:23,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:23,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:23,904 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 04:59:23,905 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 04:59:23,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:24,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:24,091 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 04:59:24,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:24,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:24,223 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 04:59:24,246 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 04:59:24,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125562210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:24,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:24,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 04:59:24,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218780759] [2022-01-18 04:59:24,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:24,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:59:24,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:59:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:59:24,247 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 04:59:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:24,514 INFO L93 Difference]: Finished difference Result 553 states and 1706 transitions. [2022-01-18 04:59:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:24,514 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 04:59:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:24,515 INFO L225 Difference]: With dead ends: 553 [2022-01-18 04:59:24,515 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 04:59:24,515 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 04:59:24,515 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 04:59:24,515 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 04:59:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 04:59:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 406. [2022-01-18 04:59:24,520 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 04:59:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1278 transitions. [2022-01-18 04:59:24,521 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1278 transitions. Word has length 20 [2022-01-18 04:59:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:24,521 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1278 transitions. [2022-01-18 04:59:24,521 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 04:59:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1278 transitions. [2022-01-18 04:59:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:24,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:24,521 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 04:59:24,537 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 04:59:24,722 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 04:59:24,722 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash 887418422, now seen corresponding path program 84 times [2022-01-18 04:59:24,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:24,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188244514] [2022-01-18 04:59:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:24,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:24,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188244514] [2022-01-18 04:59:24,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188244514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072976421] [2022-01-18 04:59:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:24,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:24,826 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 04:59:24,827 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 04:59:24,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:59:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:24,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:25,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:25,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:25,156 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 45 [2022-01-18 04:59:25,251 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 04:59:25,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072976421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:25,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:25,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76839585] [2022-01-18 04:59:25,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:25,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:25,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:25,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:25,254 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 04:59:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:25,557 INFO L93 Difference]: Finished difference Result 669 states and 1967 transitions. [2022-01-18 04:59:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:25,557 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 04:59:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:25,558 INFO L225 Difference]: With dead ends: 669 [2022-01-18 04:59:25,558 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 04:59:25,559 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 04:59:25,559 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 04:59:25,559 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 04:59:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 04:59:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 416. [2022-01-18 04:59:25,564 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 04:59:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1309 transitions. [2022-01-18 04:59:25,565 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1309 transitions. Word has length 20 [2022-01-18 04:59:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:25,565 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1309 transitions. [2022-01-18 04:59:25,565 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 04:59:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1309 transitions. [2022-01-18 04:59:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:25,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:25,566 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:25,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 04:59:25,766 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 04:59:25,766 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1382666884, now seen corresponding path program 85 times [2022-01-18 04:59:25,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:25,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529953072] [2022-01-18 04:59:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:25,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:25,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529953072] [2022-01-18 04:59:25,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529953072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153119109] [2022-01-18 04:59:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:25,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:25,858 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 04:59:25,858 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 04:59:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:25,998 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 04:59:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:26,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:26,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:26,285 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 04:59:26,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153119109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:26,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:26,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:26,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387542896] [2022-01-18 04:59:26,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:26,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:26,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:26,286 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 04:59:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:26,574 INFO L93 Difference]: Finished difference Result 712 states and 2061 transitions. [2022-01-18 04:59:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:26,574 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 04:59:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:26,575 INFO L225 Difference]: With dead ends: 712 [2022-01-18 04:59:26,575 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 04:59:26,575 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 04:59:26,576 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 04:59:26,576 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 04:59:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 04:59:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 422. [2022-01-18 04:59:26,581 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 04:59:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1334 transitions. [2022-01-18 04:59:26,582 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1334 transitions. Word has length 20 [2022-01-18 04:59:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1334 transitions. [2022-01-18 04:59:26,582 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 04:59:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1334 transitions. [2022-01-18 04:59:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:26,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:26,583 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:26,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-18 04:59:26,783 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 04:59:26,783 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -500589450, now seen corresponding path program 86 times [2022-01-18 04:59:26,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:26,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429522908] [2022-01-18 04:59:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:26,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:26,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429522908] [2022-01-18 04:59:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429522908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745345200] [2022-01-18 04:59:26,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:26,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:26,918 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 04:59:26,919 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 04:59:26,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:27,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:27,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:27,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:27,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:27,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745345200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:27,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:27,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 04:59:27,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739318602] [2022-01-18 04:59:27,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:59:27,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:59:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:59:27,332 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 04:59:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:27,632 INFO L93 Difference]: Finished difference Result 669 states and 1952 transitions. [2022-01-18 04:59:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:27,632 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 04:59:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:27,633 INFO L225 Difference]: With dead ends: 669 [2022-01-18 04:59:27,633 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 04:59:27,633 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 04:59:27,633 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 04:59:27,633 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 04:59:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 04:59:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 414. [2022-01-18 04:59:27,638 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 04:59:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1310 transitions. [2022-01-18 04:59:27,639 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1310 transitions. Word has length 20 [2022-01-18 04:59:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1310 transitions. [2022-01-18 04:59:27,639 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 04:59:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1310 transitions. [2022-01-18 04:59:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:27,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:27,640 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 04:59:27,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:27,840 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 04:59:27,840 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1643075537, now seen corresponding path program 87 times [2022-01-18 04:59:27,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682532094] [2022-01-18 04:59:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:27,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:27,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682532094] [2022-01-18 04:59:27,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682532094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501765082] [2022-01-18 04:59:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:27,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:27,936 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 04:59:27,936 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 04:59:28,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:28,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:28,067 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 54 treesize of output 42 [2022-01-18 04:59:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:28,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:28,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:28,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:59:28,288 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 04:59:28,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501765082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:28,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:28,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 04:59:28,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422421076] [2022-01-18 04:59:28,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:28,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:59:28,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:59:28,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:59:28,289 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 04:59:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:28,584 INFO L93 Difference]: Finished difference Result 629 states and 1898 transitions. [2022-01-18 04:59:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:28,584 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 04:59:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:28,585 INFO L225 Difference]: With dead ends: 629 [2022-01-18 04:59:28,585 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 04:59:28,585 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 04:59:28,585 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 04:59:28,585 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 04:59:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 04:59:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 409. [2022-01-18 04:59:28,590 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 04:59:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1285 transitions. [2022-01-18 04:59:28,591 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1285 transitions. Word has length 20 [2022-01-18 04:59:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:28,591 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1285 transitions. [2022-01-18 04:59:28,591 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 04:59:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1285 transitions. [2022-01-18 04:59:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:28,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:28,591 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 04:59:28,607 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 04:59:28,803 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 04:59:28,803 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1914568000, now seen corresponding path program 88 times [2022-01-18 04:59:28,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63442280] [2022-01-18 04:59:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:28,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:28,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63442280] [2022-01-18 04:59:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63442280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178422712] [2022-01-18 04:59:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:28,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:28,904 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 04:59:28,904 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 04:59:28,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:28,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:28,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:29,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:29,178 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 04:59:29,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:29,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:29,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:29,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178422712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:29,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:29,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:29,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864045365] [2022-01-18 04:59:29,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:29,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:29,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:29,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:29,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:29,340 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 04:59:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:29,625 INFO L93 Difference]: Finished difference Result 627 states and 1850 transitions. [2022-01-18 04:59:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:29,626 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 04:59:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:29,627 INFO L225 Difference]: With dead ends: 627 [2022-01-18 04:59:29,627 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 04:59:29,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:59:29,627 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 04:59:29,627 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 04:59:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 04:59:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 401. [2022-01-18 04:59:29,632 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 04:59:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1253 transitions. [2022-01-18 04:59:29,632 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1253 transitions. Word has length 20 [2022-01-18 04:59:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1253 transitions. [2022-01-18 04:59:29,633 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 04:59:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1253 transitions. [2022-01-18 04:59:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:29,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:29,633 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 04:59:29,649 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 04:59:29,834 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 04:59:29,834 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -703409540, now seen corresponding path program 89 times [2022-01-18 04:59:29,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572149650] [2022-01-18 04:59:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:29,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:29,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572149650] [2022-01-18 04:59:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572149650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:29,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703198367] [2022-01-18 04:59:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:29,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:29,931 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 04:59:29,931 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 04:59:30,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:59:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:30,072 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 75 treesize of output 59 [2022-01-18 04:59:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:30,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:30,329 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 45 [2022-01-18 04:59:30,393 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 04:59:30,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703198367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:30,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872925439] [2022-01-18 04:59:30,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:30,394 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 04:59:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:30,785 INFO L93 Difference]: Finished difference Result 614 states and 1807 transitions. [2022-01-18 04:59:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:30,785 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 04:59:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:30,786 INFO L225 Difference]: With dead ends: 614 [2022-01-18 04:59:30,786 INFO L226 Difference]: Without dead ends: 614 [2022-01-18 04:59:30,787 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 04:59:30,787 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 04:59:30,787 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 04:59:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-18 04:59:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 408. [2022-01-18 04:59:30,792 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 04:59:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1282 transitions. [2022-01-18 04:59:30,793 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1282 transitions. Word has length 20 [2022-01-18 04:59:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:30,793 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1282 transitions. [2022-01-18 04:59:30,793 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 04:59:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1282 transitions. [2022-01-18 04:59:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:30,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:30,794 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 04:59:30,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:31,009 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 04:59:31,010 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 570745314, now seen corresponding path program 90 times [2022-01-18 04:59:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529608032] [2022-01-18 04:59:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:31,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:31,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529608032] [2022-01-18 04:59:31,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529608032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553005434] [2022-01-18 04:59:31,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:31,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:31,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:31,109 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 04:59:31,110 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 04:59:31,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:31,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:31,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:31,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:31,505 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 49 treesize of output 45 [2022-01-18 04:59:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553005434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:31,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:31,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:31,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232626651] [2022-01-18 04:59:31,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:31,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:31,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:31,569 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 04:59:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:31,864 INFO L93 Difference]: Finished difference Result 552 states and 1664 transitions. [2022-01-18 04:59:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:31,864 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 04:59:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:31,865 INFO L225 Difference]: With dead ends: 552 [2022-01-18 04:59:31,865 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 04:59:31,865 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 04:59:31,866 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 04:59:31,866 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 04:59:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 04:59:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 399. [2022-01-18 04:59:31,870 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 04:59:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1243 transitions. [2022-01-18 04:59:31,871 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1243 transitions. Word has length 20 [2022-01-18 04:59:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:31,871 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1243 transitions. [2022-01-18 04:59:31,871 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 04:59:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1243 transitions. [2022-01-18 04:59:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:31,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:31,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:31,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 04:59:32,072 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 04:59:32,072 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash -46867367, now seen corresponding path program 91 times [2022-01-18 04:59:32,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:32,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593403835] [2022-01-18 04:59:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:32,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:32,120 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 04:59:32,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593403835] [2022-01-18 04:59:32,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593403835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242535326] [2022-01-18 04:59:32,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:32,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:32,122 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 04:59:32,122 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 04:59:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:32,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:32,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:32,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:32,437 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 27 treesize of output 27 [2022-01-18 04:59:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:32,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242535326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:32,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:32,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 04:59:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812066991] [2022-01-18 04:59:32,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:32,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 04:59:32,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 04:59:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:59:32,460 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 04:59:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:32,730 INFO L93 Difference]: Finished difference Result 531 states and 1592 transitions. [2022-01-18 04:59:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:32,730 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 04:59:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:32,731 INFO L225 Difference]: With dead ends: 531 [2022-01-18 04:59:32,731 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 04:59:32,731 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 04:59:32,731 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 04:59:32,731 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 04:59:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 04:59:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 393. [2022-01-18 04:59:32,735 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 04:59:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1213 transitions. [2022-01-18 04:59:32,735 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1213 transitions. Word has length 20 [2022-01-18 04:59:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:32,736 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1213 transitions. [2022-01-18 04:59:32,736 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 04:59:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1213 transitions. [2022-01-18 04:59:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:32,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:32,736 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 04:59:32,752 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 04:59:32,937 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 04:59:32,937 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash -180354516, now seen corresponding path program 92 times [2022-01-18 04:59:32,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:32,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119425662] [2022-01-18 04:59:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:32,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:33,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119425662] [2022-01-18 04:59:33,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119425662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128248449] [2022-01-18 04:59:33,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:33,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:33,041 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 04:59:33,041 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 04:59:33,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:33,183 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 75 treesize of output 59 [2022-01-18 04:59:33,316 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 04:59:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:33,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:33,447 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 04:59:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:33,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128248449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:33,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:33,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:33,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034785285] [2022-01-18 04:59:33,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:33,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:33,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:33,510 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 04:59:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:33,820 INFO L93 Difference]: Finished difference Result 644 states and 1881 transitions. [2022-01-18 04:59:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:33,820 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 04:59:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:33,821 INFO L225 Difference]: With dead ends: 644 [2022-01-18 04:59:33,821 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 04:59:33,821 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 04:59:33,821 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 04:59:33,821 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 04:59:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 04:59:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 390. [2022-01-18 04:59:33,826 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 04:59:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2022-01-18 04:59:33,827 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 20 [2022-01-18 04:59:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2022-01-18 04:59:33,827 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 04:59:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2022-01-18 04:59:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:33,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:33,827 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 04:59:33,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:34,028 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 04:59:34,028 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 560542818, now seen corresponding path program 93 times [2022-01-18 04:59:34,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590257204] [2022-01-18 04:59:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:34,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:34,127 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 04:59:34,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590257204] [2022-01-18 04:59:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590257204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984371210] [2022-01-18 04:59:34,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:34,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:34,128 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 04:59:34,129 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 04:59:34,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:34,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:34,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:34,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:34,539 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 49 treesize of output 45 [2022-01-18 04:59:34,596 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 04:59:34,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984371210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:34,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:34,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:34,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069157425] [2022-01-18 04:59:34,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:34,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:34,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:34,597 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 04:59:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:35,048 INFO L93 Difference]: Finished difference Result 669 states and 1935 transitions. [2022-01-18 04:59:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:35,048 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 04:59:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:35,049 INFO L225 Difference]: With dead ends: 669 [2022-01-18 04:59:35,049 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 04:59:35,049 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 04:59:35,050 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 04:59:35,050 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 04:59:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 04:59:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 383. [2022-01-18 04:59:35,054 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 04:59:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1187 transitions. [2022-01-18 04:59:35,055 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1187 transitions. Word has length 20 [2022-01-18 04:59:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:35,055 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1187 transitions. [2022-01-18 04:59:35,055 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 04:59:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1187 transitions. [2022-01-18 04:59:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:35,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:35,056 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 04:59:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:35,256 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 04:59:35,256 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1554918438, now seen corresponding path program 94 times [2022-01-18 04:59:35,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518459941] [2022-01-18 04:59:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:35,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:35,360 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 04:59:35,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518459941] [2022-01-18 04:59:35,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518459941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594302383] [2022-01-18 04:59:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:35,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:35,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:35,361 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 04:59:35,362 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 04:59:35,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:35,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:35,645 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 04:59:35,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:35,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:35,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:35,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594302383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:35,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:35,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:35,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317621525] [2022-01-18 04:59:35,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:35,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:35,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:35,835 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 04:59:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:36,146 INFO L93 Difference]: Finished difference Result 603 states and 1787 transitions. [2022-01-18 04:59:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:36,146 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 04:59:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:36,147 INFO L225 Difference]: With dead ends: 603 [2022-01-18 04:59:36,147 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 04:59:36,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:59:36,148 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 04:59:36,148 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 04:59:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 04:59:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 380. [2022-01-18 04:59:36,152 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 04:59:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1172 transitions. [2022-01-18 04:59:36,152 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1172 transitions. Word has length 20 [2022-01-18 04:59:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:36,153 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1172 transitions. [2022-01-18 04:59:36,153 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 04:59:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1172 transitions. [2022-01-18 04:59:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:36,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:36,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:36,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:36,353 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 04:59:36,354 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1759595726, now seen corresponding path program 95 times [2022-01-18 04:59:36,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:36,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050017902] [2022-01-18 04:59:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:36,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:36,463 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 04:59:36,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050017902] [2022-01-18 04:59:36,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050017902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523085771] [2022-01-18 04:59:36,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:36,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:36,464 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 04:59:36,465 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 04:59:36,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:36,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:36,607 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 72 treesize of output 56 [2022-01-18 04:59:36,727 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 04:59:36,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:36,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:36,842 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 45 [2022-01-18 04:59:36,923 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 04:59:36,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523085771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:36,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:36,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:36,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207020062] [2022-01-18 04:59:36,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:36,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:36,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:36,925 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 04:59:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:37,313 INFO L93 Difference]: Finished difference Result 575 states and 1689 transitions. [2022-01-18 04:59:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:37,313 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 04:59:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:37,314 INFO L225 Difference]: With dead ends: 575 [2022-01-18 04:59:37,314 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 04:59:37,315 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 04:59:37,315 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 04:59:37,315 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 04:59:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 04:59:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 390. [2022-01-18 04:59:37,319 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 04:59:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1199 transitions. [2022-01-18 04:59:37,320 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1199 transitions. Word has length 20 [2022-01-18 04:59:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:37,320 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1199 transitions. [2022-01-18 04:59:37,320 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 04:59:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1199 transitions. [2022-01-18 04:59:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:37,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:37,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:37,337 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 04:59:37,521 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 04:59:37,521 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1735695812, now seen corresponding path program 96 times [2022-01-18 04:59:37,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:37,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261057860] [2022-01-18 04:59:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:37,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:37,625 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 04:59:37,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261057860] [2022-01-18 04:59:37,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261057860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150482112] [2022-01-18 04:59:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:37,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:37,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:37,627 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 04:59:37,627 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 04:59:37,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:37,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:37,773 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 72 treesize of output 56 [2022-01-18 04:59:37,903 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 04:59:37,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:38,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:38,019 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 49 treesize of output 45 [2022-01-18 04:59:38,077 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 04:59:38,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150482112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:38,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:38,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:38,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551520020] [2022-01-18 04:59:38,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:38,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:38,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:38,078 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 04:59:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:38,340 INFO L93 Difference]: Finished difference Result 546 states and 1635 transitions. [2022-01-18 04:59:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:38,340 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 04:59:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:38,341 INFO L225 Difference]: With dead ends: 546 [2022-01-18 04:59:38,341 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 04:59:38,341 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 04:59:38,341 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 04:59:38,341 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 04:59:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 04:59:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 377. [2022-01-18 04:59:38,345 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 04:59:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1159 transitions. [2022-01-18 04:59:38,346 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1159 transitions. Word has length 20 [2022-01-18 04:59:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1159 transitions. [2022-01-18 04:59:38,346 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 04:59:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1159 transitions. [2022-01-18 04:59:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:38,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:38,346 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:38,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:38,547 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 04:59:38,547 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1985165052, now seen corresponding path program 97 times [2022-01-18 04:59:38,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:38,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795370687] [2022-01-18 04:59:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:38,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:38,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:38,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795370687] [2022-01-18 04:59:38,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795370687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:38,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757452660] [2022-01-18 04:59:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:38,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:38,663 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 04:59:38,663 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 04:59:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:38,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:39,022 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 04:59:39,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:39,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:39,170 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 49 treesize of output 45 [2022-01-18 04:59:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757452660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:39,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766495595] [2022-01-18 04:59:39,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:39,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:39,234 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 04:59:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:39,676 INFO L93 Difference]: Finished difference Result 467 states and 1389 transitions. [2022-01-18 04:59:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:39,676 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 04:59:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:39,677 INFO L225 Difference]: With dead ends: 467 [2022-01-18 04:59:39,677 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 04:59:39,677 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 04:59:39,677 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 04:59:39,677 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 04:59:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 04:59:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 384. [2022-01-18 04:59:39,681 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 04:59:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1186 transitions. [2022-01-18 04:59:39,681 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1186 transitions. Word has length 20 [2022-01-18 04:59:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:39,681 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1186 transitions. [2022-01-18 04:59:39,682 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 04:59:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1186 transitions. [2022-01-18 04:59:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:39,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:39,682 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 04:59:39,698 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 04:59:39,883 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 04:59:39,884 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1427724810, now seen corresponding path program 98 times [2022-01-18 04:59:39,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177232370] [2022-01-18 04:59:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:39,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:39,993 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 04:59:39,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177232370] [2022-01-18 04:59:39,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177232370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380905318] [2022-01-18 04:59:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:39,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:39,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:39,994 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 04:59:39,995 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 04:59:40,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:40,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:40,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:40,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:40,376 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 04:59:40,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:40,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:40,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:40,563 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 04:59:40,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380905318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:40,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:40,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:40,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266650044] [2022-01-18 04:59:40,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:40,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:40,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:40,564 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 04:59:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:40,975 INFO L93 Difference]: Finished difference Result 473 states and 1396 transitions. [2022-01-18 04:59:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:59:40,975 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 04:59:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:40,976 INFO L225 Difference]: With dead ends: 473 [2022-01-18 04:59:40,976 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 04:59:40,976 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 04:59:40,976 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 04:59:40,976 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 04:59:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 04:59:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 381. [2022-01-18 04:59:40,980 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 04:59:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1175 transitions. [2022-01-18 04:59:40,981 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1175 transitions. Word has length 20 [2022-01-18 04:59:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:40,981 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1175 transitions. [2022-01-18 04:59:40,981 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 04:59:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1175 transitions. [2022-01-18 04:59:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:40,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:40,981 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:40,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:41,182 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 04:59:41,182 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1962954612, now seen corresponding path program 99 times [2022-01-18 04:59:41,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:41,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267408186] [2022-01-18 04:59:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:41,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:41,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267408186] [2022-01-18 04:59:41,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267408186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557333254] [2022-01-18 04:59:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:41,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:41,266 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 04:59:41,266 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 04:59:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 04:59:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:41,561 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 54 treesize of output 42 [2022-01-18 04:59:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:41,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:41,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:41,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:41,778 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 04:59:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557333254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:41,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:41,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:41,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952954498] [2022-01-18 04:59:41,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:41,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:41,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:41,779 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 04:59:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:42,308 INFO L93 Difference]: Finished difference Result 437 states and 1314 transitions. [2022-01-18 04:59:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:42,318 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 04:59:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:42,319 INFO L225 Difference]: With dead ends: 437 [2022-01-18 04:59:42,319 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 04:59:42,319 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 04:59:42,319 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 04:59:42,319 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 04:59:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 04:59:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 378. [2022-01-18 04:59:42,323 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 04:59:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1164 transitions. [2022-01-18 04:59:42,323 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1164 transitions. Word has length 20 [2022-01-18 04:59:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:42,323 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1164 transitions. [2022-01-18 04:59:42,323 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 04:59:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1164 transitions. [2022-01-18 04:59:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:42,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:42,324 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 04:59:42,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:42,536 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 04:59:42,536 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash -816821370, now seen corresponding path program 100 times [2022-01-18 04:59:42,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:42,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167326127] [2022-01-18 04:59:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:42,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:42,637 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 04:59:42,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167326127] [2022-01-18 04:59:42,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167326127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719957393] [2022-01-18 04:59:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:42,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:42,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:42,638 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 04:59:42,639 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 04:59:42,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:42,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:42,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:42,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:43,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:43,114 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 49 treesize of output 45 [2022-01-18 04:59:43,195 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 04:59:43,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719957393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:43,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:43,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:43,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321129955] [2022-01-18 04:59:43,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:43,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:43,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:43,196 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 04:59:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:43,637 INFO L93 Difference]: Finished difference Result 551 states and 1599 transitions. [2022-01-18 04:59:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:43,637 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 04:59:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:43,638 INFO L225 Difference]: With dead ends: 551 [2022-01-18 04:59:43,638 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 04:59:43,638 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 04:59:43,638 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 04:59:43,638 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 04:59:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 04:59:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 386. [2022-01-18 04:59:43,643 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 04:59:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1200 transitions. [2022-01-18 04:59:43,643 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1200 transitions. Word has length 20 [2022-01-18 04:59:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:43,643 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1200 transitions. [2022-01-18 04:59:43,643 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 04:59:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1200 transitions. [2022-01-18 04:59:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:43,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:43,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:43,660 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 04:59:43,844 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 04:59:43,844 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 65256064, now seen corresponding path program 101 times [2022-01-18 04:59:43,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20027810] [2022-01-18 04:59:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:43,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:43,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:43,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20027810] [2022-01-18 04:59:43,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20027810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268569395] [2022-01-18 04:59:43,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:43,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:43,949 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 04:59:43,949 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 04:59:44,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:44,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:44,280 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 04:59:44,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:44,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:44,399 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 04:59:44,460 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 04:59:44,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268569395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:44,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:44,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:44,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539621872] [2022-01-18 04:59:44,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:44,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:44,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:44,461 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 04:59:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:44,965 INFO L93 Difference]: Finished difference Result 557 states and 1600 transitions. [2022-01-18 04:59:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:59:44,966 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 04:59:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:44,966 INFO L225 Difference]: With dead ends: 557 [2022-01-18 04:59:44,966 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 04:59:44,967 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 04:59:44,967 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 04:59:44,967 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 04:59:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 04:59:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 389. [2022-01-18 04:59:44,971 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 04:59:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1202 transitions. [2022-01-18 04:59:44,972 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1202 transitions. Word has length 20 [2022-01-18 04:59:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:44,972 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1202 transitions. [2022-01-18 04:59:44,972 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 04:59:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1202 transitions. [2022-01-18 04:59:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:44,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:44,972 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:44,988 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 04:59:45,173 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 04:59:45,174 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -75924036, now seen corresponding path program 102 times [2022-01-18 04:59:45,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:45,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7319759] [2022-01-18 04:59:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:45,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:45,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7319759] [2022-01-18 04:59:45,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7319759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165822920] [2022-01-18 04:59:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:45,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:45,283 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 04:59:45,283 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 04:59:45,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:45,508 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 90 treesize of output 72 [2022-01-18 04:59:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:45,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:45,787 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 49 treesize of output 45 [2022-01-18 04:59:45,853 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 04:59:45,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165822920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:45,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:45,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:45,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577682878] [2022-01-18 04:59:45,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:45,854 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 04:59:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:46,317 INFO L93 Difference]: Finished difference Result 548 states and 1586 transitions. [2022-01-18 04:59:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:46,318 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 04:59:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:46,318 INFO L225 Difference]: With dead ends: 548 [2022-01-18 04:59:46,318 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 04:59:46,319 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 04:59:46,319 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 04:59:46,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 235 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 04:59:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 04:59:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 382. [2022-01-18 04:59:46,323 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 04:59:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1184 transitions. [2022-01-18 04:59:46,323 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1184 transitions. Word has length 20 [2022-01-18 04:59:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:46,324 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1184 transitions. [2022-01-18 04:59:46,324 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 04:59:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1184 transitions. [2022-01-18 04:59:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:46,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:46,324 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 04:59:46,340 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 04:59:46,540 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 04:59:46,540 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 918451584, now seen corresponding path program 103 times [2022-01-18 04:59:46,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:46,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039229244] [2022-01-18 04:59:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:46,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:46,648 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 04:59:46,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039229244] [2022-01-18 04:59:46,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039229244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140430316] [2022-01-18 04:59:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:46,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:46,650 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 04:59:46,650 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 04:59:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:46,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:47,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:47,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:47,208 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 04:59:47,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140430316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:47,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:47,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:47,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096331688] [2022-01-18 04:59:47,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:47,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:47,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:47,209 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 04:59:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:47,530 INFO L93 Difference]: Finished difference Result 482 states and 1438 transitions. [2022-01-18 04:59:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:47,530 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 04:59:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:47,531 INFO L225 Difference]: With dead ends: 482 [2022-01-18 04:59:47,531 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 04:59:47,531 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 04:59:47,532 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 04:59:47,532 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 04:59:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 04:59:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 379. [2022-01-18 04:59:47,535 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 04:59:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1169 transitions. [2022-01-18 04:59:47,536 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1169 transitions. Word has length 20 [2022-01-18 04:59:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:47,536 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1169 transitions. [2022-01-18 04:59:47,536 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 04:59:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1169 transitions. [2022-01-18 04:59:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:47,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:47,537 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 04:59:47,552 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 04:59:47,737 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 04:59:47,737 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1898904716, now seen corresponding path program 104 times [2022-01-18 04:59:47,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:47,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785812069] [2022-01-18 04:59:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:47,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:47,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785812069] [2022-01-18 04:59:47,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785812069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701917759] [2022-01-18 04:59:47,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:47,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:47,854 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 04:59:47,854 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 04:59:47,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:48,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:48,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:48,320 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 04:59:48,383 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 04:59:48,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701917759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:48,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:48,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:48,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499851973] [2022-01-18 04:59:48,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:48,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:48,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:48,384 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 04:59:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:48,950 INFO L93 Difference]: Finished difference Result 525 states and 1527 transitions. [2022-01-18 04:59:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:59:48,951 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 04:59:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:48,952 INFO L225 Difference]: With dead ends: 525 [2022-01-18 04:59:48,952 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 04:59:48,952 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 04:59:48,952 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 04:59:48,952 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 04:59:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 04:59:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 389. [2022-01-18 04:59:48,956 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 04:59:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1196 transitions. [2022-01-18 04:59:48,957 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1196 transitions. Word has length 20 [2022-01-18 04:59:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:48,957 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1196 transitions. [2022-01-18 04:59:48,957 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 04:59:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1196 transitions. [2022-01-18 04:59:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:48,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:48,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:48,973 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 04:59:49,158 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 04:59:49,158 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:49,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:49,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1922804630, now seen corresponding path program 105 times [2022-01-18 04:59:49,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:49,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101080445] [2022-01-18 04:59:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:49,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:49,263 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 04:59:49,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101080445] [2022-01-18 04:59:49,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101080445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426169927] [2022-01-18 04:59:49,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:49,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:49,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:49,264 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 04:59:49,265 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 04:59:49,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:49,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:49,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:49,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:49,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:49,806 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 45 [2022-01-18 04:59:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426169927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:49,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:49,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:49,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548652148] [2022-01-18 04:59:49,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:49,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:49,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:49,870 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 04:59:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:50,268 INFO L93 Difference]: Finished difference Result 496 states and 1473 transitions. [2022-01-18 04:59:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:50,269 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 04:59:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:50,269 INFO L225 Difference]: With dead ends: 496 [2022-01-18 04:59:50,269 INFO L226 Difference]: Without dead ends: 496 [2022-01-18 04:59:50,269 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 04:59:50,270 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 04:59:50,270 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 04:59:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-18 04:59:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 378. [2022-01-18 04:59:50,273 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 04:59:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1164 transitions. [2022-01-18 04:59:50,274 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1164 transitions. Word has length 20 [2022-01-18 04:59:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:50,274 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1164 transitions. [2022-01-18 04:59:50,274 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 04:59:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1164 transitions. [2022-01-18 04:59:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:50,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:50,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:50,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:50,475 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 04:59:50,475 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -954421248, now seen corresponding path program 106 times [2022-01-18 04:59:50,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:50,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090172661] [2022-01-18 04:59:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:50,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:50,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090172661] [2022-01-18 04:59:50,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090172661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64305569] [2022-01-18 04:59:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:50,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:50,564 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 04:59:50,564 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 04:59:50,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:50,846 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 54 treesize of output 42 [2022-01-18 04:59:50,871 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 04:59:50,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:50,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:50,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64305569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:51,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:51,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:51,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293415062] [2022-01-18 04:59:51,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:51,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:51,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:51,054 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 04:59:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:51,458 INFO L93 Difference]: Finished difference Result 428 states and 1290 transitions. [2022-01-18 04:59:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:51,458 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 04:59:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:51,459 INFO L225 Difference]: With dead ends: 428 [2022-01-18 04:59:51,459 INFO L226 Difference]: Without dead ends: 416 [2022-01-18 04:59:51,459 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 04:59:51,459 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 04:59:51,460 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 04:59:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-18 04:59:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 380. [2022-01-18 04:59:51,463 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 04:59:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1169 transitions. [2022-01-18 04:59:51,463 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1169 transitions. Word has length 20 [2022-01-18 04:59:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:51,464 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1169 transitions. [2022-01-18 04:59:51,464 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 04:59:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1169 transitions. [2022-01-18 04:59:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:51,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:51,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:51,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 04:59:51,664 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 04:59:51,665 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -213523914, now seen corresponding path program 107 times [2022-01-18 04:59:51,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021114349] [2022-01-18 04:59:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:51,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:51,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:51,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021114349] [2022-01-18 04:59:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021114349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:51,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788871394] [2022-01-18 04:59:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:51,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:51,760 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 04:59:51,760 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 04:59:51,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:52,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:52,104 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 04:59:52,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:52,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:52,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:52,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788871394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:52,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:52,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:52,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110435469] [2022-01-18 04:59:52,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:52,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:52,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:52,274 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 04:59:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:52,731 INFO L93 Difference]: Finished difference Result 453 states and 1342 transitions. [2022-01-18 04:59:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:52,731 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 04:59:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:52,732 INFO L225 Difference]: With dead ends: 453 [2022-01-18 04:59:52,732 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 04:59:52,732 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 04:59:52,732 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 04:59:52,732 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 04:59:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 04:59:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 390. [2022-01-18 04:59:52,736 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 04:59:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1196 transitions. [2022-01-18 04:59:52,736 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1196 transitions. Word has length 20 [2022-01-18 04:59:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:52,736 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1196 transitions. [2022-01-18 04:59:52,737 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 04:59:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1196 transitions. [2022-01-18 04:59:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:52,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:52,737 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 04:59:52,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 04:59:52,937 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 04:59:52,937 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -189624000, now seen corresponding path program 108 times [2022-01-18 04:59:52,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:52,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773794054] [2022-01-18 04:59:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:52,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:53,018 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 04:59:53,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773794054] [2022-01-18 04:59:53,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773794054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755001723] [2022-01-18 04:59:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:53,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:53,019 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 04:59:53,019 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 04:59:53,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:59:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:53,273 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 75 treesize of output 59 [2022-01-18 04:59:53,337 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 04:59:53,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:53,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:53,457 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 45 [2022-01-18 04:59:53,517 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 04:59:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755001723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:53,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 04:59:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34139917] [2022-01-18 04:59:53,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:53,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:59:53,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:59:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:59:53,518 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 04:59:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:53,754 INFO L93 Difference]: Finished difference Result 424 states and 1288 transitions. [2022-01-18 04:59:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:53,754 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 04:59:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:53,755 INFO L225 Difference]: With dead ends: 424 [2022-01-18 04:59:53,755 INFO L226 Difference]: Without dead ends: 424 [2022-01-18 04:59:53,755 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 04:59:53,756 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 04:59:53,756 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 04:59:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-18 04:59:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 375. [2022-01-18 04:59:53,759 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 04:59:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1151 transitions. [2022-01-18 04:59:53,760 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1151 transitions. Word has length 20 [2022-01-18 04:59:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:53,760 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1151 transitions. [2022-01-18 04:59:53,760 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 04:59:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1151 transitions. [2022-01-18 04:59:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:53,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:53,760 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 04:59:53,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 04:59:53,961 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 04:59:53,961 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1663184868, now seen corresponding path program 109 times [2022-01-18 04:59:53,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267141349] [2022-01-18 04:59:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:54,053 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 04:59:54,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267141349] [2022-01-18 04:59:54,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267141349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738900776] [2022-01-18 04:59:54,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:54,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:54,055 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 04:59:54,055 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 04:59:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:54,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:54,195 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 54 treesize of output 42 [2022-01-18 04:59:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:54,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:54,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:54,411 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 04:59:54,434 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 04:59:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738900776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:54,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:54,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:54,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389311772] [2022-01-18 04:59:54,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:54,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:54,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:54,435 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 04:59:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:54,676 INFO L93 Difference]: Finished difference Result 567 states and 1682 transitions. [2022-01-18 04:59:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:54,676 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 04:59:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:54,677 INFO L225 Difference]: With dead ends: 567 [2022-01-18 04:59:54,677 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 04:59:54,677 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 04:59:54,677 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 04:59:54,678 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 04:59:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 04:59:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 391. [2022-01-18 04:59:54,682 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 04:59:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1210 transitions. [2022-01-18 04:59:54,682 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1210 transitions. Word has length 20 [2022-01-18 04:59:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:54,682 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1210 transitions. [2022-01-18 04:59:54,682 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 04:59:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1210 transitions. [2022-01-18 04:59:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:54,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:54,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:54,699 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 04:59:54,883 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 04:59:54,883 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash 361697122, now seen corresponding path program 110 times [2022-01-18 04:59:54,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:54,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305209800] [2022-01-18 04:59:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:54,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:54,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305209800] [2022-01-18 04:59:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305209800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153221926] [2022-01-18 04:59:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:59:54,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:54,982 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 04:59:54,983 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 04:59:55,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:59:55,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:55,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:55,122 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 54 treesize of output 42 [2022-01-18 04:59:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:55,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:55,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:55,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:59:55,392 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 04:59:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153221926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:55,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:55,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 04:59:55,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555377496] [2022-01-18 04:59:55,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:55,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 04:59:55,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 04:59:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:59:55,393 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 04:59:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:55,688 INFO L93 Difference]: Finished difference Result 619 states and 1803 transitions. [2022-01-18 04:59:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:59:55,688 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 04:59:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:55,689 INFO L225 Difference]: With dead ends: 619 [2022-01-18 04:59:55,689 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 04:59:55,689 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 04:59:55,689 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 04:59:55,689 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 04:59:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 04:59:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 397. [2022-01-18 04:59:55,693 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 04:59:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1235 transitions. [2022-01-18 04:59:55,694 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1235 transitions. Word has length 20 [2022-01-18 04:59:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:55,694 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1235 transitions. [2022-01-18 04:59:55,694 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 04:59:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1235 transitions. [2022-01-18 04:59:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:55,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:55,695 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:55,711 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 04:59:55,895 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 04:59:55,895 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1243774556, now seen corresponding path program 111 times [2022-01-18 04:59:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:55,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181881324] [2022-01-18 04:59:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:55,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:55,973 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 04:59:55,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:55,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181881324] [2022-01-18 04:59:55,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181881324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:55,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276908078] [2022-01-18 04:59:55,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:59:55,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:55,975 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 04:59:55,975 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 04:59:56,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:59:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:56,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:56,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:56,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:56,326 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 27 treesize of output 27 [2022-01-18 04:59:56,349 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 04:59:56,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276908078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:56,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:56,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 04:59:56,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264286582] [2022-01-18 04:59:56,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 04:59:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 04:59:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:59:56,350 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 04:59:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:56,583 INFO L93 Difference]: Finished difference Result 576 states and 1694 transitions. [2022-01-18 04:59:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:56,583 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 04:59:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:56,584 INFO L225 Difference]: With dead ends: 576 [2022-01-18 04:59:56,584 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 04:59:56,585 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 04:59:56,585 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:59:56,585 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 04:59:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 04:59:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 395. [2022-01-18 04:59:56,589 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 04:59:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1224 transitions. [2022-01-18 04:59:56,590 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1224 transitions. Word has length 20 [2022-01-18 04:59:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:56,590 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1224 transitions. [2022-01-18 04:59:56,590 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 04:59:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1224 transitions. [2022-01-18 04:59:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:56,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:56,590 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 04:59:56,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 04:59:56,791 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 04:59:56,791 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 710005027, now seen corresponding path program 112 times [2022-01-18 04:59:56,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139151221] [2022-01-18 04:59:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:56,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:56,852 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 04:59:56,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139151221] [2022-01-18 04:59:56,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139151221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023586512] [2022-01-18 04:59:56,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:59:56,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:56,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:56,853 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 04:59:56,853 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 04:59:56,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:59:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:57,004 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 04:59:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:57,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:57,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:57,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 04:59:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023586512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:57,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:57,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 04:59:57,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202858608] [2022-01-18 04:59:57,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:57,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:59:57,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:59:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:59:57,275 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 04:59:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:57,554 INFO L93 Difference]: Finished difference Result 566 states and 1686 transitions. [2022-01-18 04:59:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:59:57,555 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 04:59:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:57,555 INFO L225 Difference]: With dead ends: 566 [2022-01-18 04:59:57,555 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 04:59:57,556 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 04:59:57,556 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 04:59:57,556 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 04:59:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 04:59:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 401. [2022-01-18 04:59:57,560 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 04:59:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1251 transitions. [2022-01-18 04:59:57,560 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1251 transitions. Word has length 20 [2022-01-18 04:59:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:57,560 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1251 transitions. [2022-01-18 04:59:57,561 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 04:59:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1251 transitions. [2022-01-18 04:59:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:57,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:57,561 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 04:59:57,577 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 04:59:57,761 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 04:59:57,762 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash -170203994, now seen corresponding path program 113 times [2022-01-18 04:59:57,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331464857] [2022-01-18 04:59:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:57,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:57,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331464857] [2022-01-18 04:59:57,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331464857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:57,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042501455] [2022-01-18 04:59:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:59:57,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:57,861 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 04:59:57,861 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 04:59:57,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:59:57,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:58,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:58,101 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 04:59:58,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:58,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:58,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:59:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042501455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:58,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:58,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:58,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368299806] [2022-01-18 04:59:58,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:58,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:58,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:58,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:58,256 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 04:59:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:58,519 INFO L93 Difference]: Finished difference Result 679 states and 1992 transitions. [2022-01-18 04:59:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:58,520 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 04:59:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:58,520 INFO L225 Difference]: With dead ends: 679 [2022-01-18 04:59:58,520 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 04:59:58,521 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 04:59:58,521 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 04:59:58,521 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 04:59:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 04:59:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 403. [2022-01-18 04:59:58,525 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 04:59:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1261 transitions. [2022-01-18 04:59:58,526 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1261 transitions. Word has length 20 [2022-01-18 04:59:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:58,526 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1261 transitions. [2022-01-18 04:59:58,526 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 04:59:58,526 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1261 transitions. [2022-01-18 04:59:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:58,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:58,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:59:58,542 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 04:59:58,728 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 04:59:58,728 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1040954466, now seen corresponding path program 114 times [2022-01-18 04:59:58,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:58,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225923425] [2022-01-18 04:59:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:58,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:58,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225923425] [2022-01-18 04:59:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225923425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605764785] [2022-01-18 04:59:58,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:59:58,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:58,822 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 04:59:58,822 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 04:59:58,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 04:59:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:59:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:58,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:58,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:59:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:59:59,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:59:59,256 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 27 treesize of output 27 [2022-01-18 04:59:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:59:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605764785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:59:59,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:59:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 04:59:59,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355549961] [2022-01-18 04:59:59,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:59:59,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 04:59:59,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:59:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 04:59:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:59:59,281 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 04:59:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:59:59,498 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2022-01-18 04:59:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:59:59,498 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 04:59:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:59:59,499 INFO L225 Difference]: With dead ends: 646 [2022-01-18 04:59:59,499 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 04:59:59,499 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 04:59:59,500 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 04:59:59,500 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 04:59:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 04:59:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 410. [2022-01-18 04:59:59,504 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 04:59:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1290 transitions. [2022-01-18 04:59:59,505 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1290 transitions. Word has length 20 [2022-01-18 04:59:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:59:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1290 transitions. [2022-01-18 04:59:59,505 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 04:59:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1290 transitions. [2022-01-18 04:59:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 04:59:59,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:59:59,506 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 04:59:59,521 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 04:59:59,706 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 04:59:59,706 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 04:59:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:59:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1979857976, now seen corresponding path program 115 times [2022-01-18 04:59:59,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:59:59,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435585337] [2022-01-18 04:59:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:59:59,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:59:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:59,796 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 04:59:59,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:59:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435585337] [2022-01-18 04:59:59,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435585337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:59:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896089766] [2022-01-18 04:59:59,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:59:59,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:59:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:59:59,803 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 04:59:59,804 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 04:59:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:59:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 04:59:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:59:59,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:00,077 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 05:00:00,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:00,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:00,221 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 05:00:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:00,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896089766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:00,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:00,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:00,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455828014] [2022-01-18 05:00:00,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:00,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:00,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:00,244 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 05:00:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:00,487 INFO L93 Difference]: Finished difference Result 613 states and 1833 transitions. [2022-01-18 05:00:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:00,488 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 05:00:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:00,488 INFO L225 Difference]: With dead ends: 613 [2022-01-18 05:00:00,488 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 05:00:00,489 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 05:00:00,489 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 05:00:00,489 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 05:00:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 05:00:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 401. [2022-01-18 05:00:00,493 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 05:00:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1251 transitions. [2022-01-18 05:00:00,494 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1251 transitions. Word has length 20 [2022-01-18 05:00:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:00,494 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1251 transitions. [2022-01-18 05:00:00,494 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 05:00:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1251 transitions. [2022-01-18 05:00:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:00,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:00,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:00,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 05:00:00,695 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 05:00:00,695 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1697496639, now seen corresponding path program 116 times [2022-01-18 05:00:00,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:00,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689465248] [2022-01-18 05:00:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:00,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:00,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689465248] [2022-01-18 05:00:00,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689465248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128715093] [2022-01-18 05:00:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:00,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:00,753 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 05:00:00,754 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 05:00:00,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:00,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:00,908 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 72 treesize of output 56 [2022-01-18 05:00:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:01,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:01,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:01,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:01,174 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 05:00:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128715093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:01,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:01,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:00:01,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852988769] [2022-01-18 05:00:01,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:01,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:00:01,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:00:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:00:01,175 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 05:00:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:01,473 INFO L93 Difference]: Finished difference Result 567 states and 1668 transitions. [2022-01-18 05:00:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:01,474 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 05:00:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:01,474 INFO L225 Difference]: With dead ends: 567 [2022-01-18 05:00:01,474 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 05:00:01,475 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 05:00:01,475 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 05:00:01,475 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 05:00:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 05:00:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 398. [2022-01-18 05:00:01,479 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 05:00:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1234 transitions. [2022-01-18 05:00:01,479 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1234 transitions. Word has length 20 [2022-01-18 05:00:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:01,480 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1234 transitions. [2022-01-18 05:00:01,480 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 05:00:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1234 transitions. [2022-01-18 05:00:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:01,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:01,480 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 05:00:01,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:01,680 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 05:00:01,681 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1564009490, now seen corresponding path program 117 times [2022-01-18 05:00:01,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:01,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778606780] [2022-01-18 05:00:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:01,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:01,771 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 05:00:01,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778606780] [2022-01-18 05:00:01,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778606780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951009361] [2022-01-18 05:00:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:01,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:01,774 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 05:00:01,774 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 05:00:01,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:01,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:01,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:02,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:02,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:02,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:02,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951009361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:02,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:02,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:02,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175249322] [2022-01-18 05:00:02,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:02,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:02,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:02,232 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 05:00:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:02,575 INFO L93 Difference]: Finished difference Result 746 states and 2119 transitions. [2022-01-18 05:00:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:02,575 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 05:00:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:02,576 INFO L225 Difference]: With dead ends: 746 [2022-01-18 05:00:02,576 INFO L226 Difference]: Without dead ends: 746 [2022-01-18 05:00:02,576 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 05:00:02,577 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 05:00:02,577 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 05:00:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-18 05:00:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 406. [2022-01-18 05:00:02,582 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 05:00:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1270 transitions. [2022-01-18 05:00:02,582 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1270 transitions. Word has length 20 [2022-01-18 05:00:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:02,583 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1270 transitions. [2022-01-18 05:00:02,583 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 05:00:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1270 transitions. [2022-01-18 05:00:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:02,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:02,583 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:02,599 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 05:00:02,783 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 05:00:02,784 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1848880372, now seen corresponding path program 118 times [2022-01-18 05:00:02,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305927847] [2022-01-18 05:00:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:02,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:02,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305927847] [2022-01-18 05:00:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305927847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:02,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305251548] [2022-01-18 05:00:02,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:02,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:02,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:02,895 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 05:00:02,896 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 05:00:02,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:03,042 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 05:00:03,158 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 05:00:03,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:03,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:03,297 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 27 treesize of output 27 [2022-01-18 05:00:03,319 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 05:00:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305251548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:03,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:03,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:03,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530471858] [2022-01-18 05:00:03,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:03,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:03,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:03,320 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 05:00:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:03,555 INFO L93 Difference]: Finished difference Result 680 states and 1965 transitions. [2022-01-18 05:00:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:03,555 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 05:00:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:03,556 INFO L225 Difference]: With dead ends: 680 [2022-01-18 05:00:03,556 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 05:00:03,556 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 05:00:03,556 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 05:00:03,556 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 05:00:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 05:00:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-01-18 05:00:03,561 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 05:00:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1245 transitions. [2022-01-18 05:00:03,562 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1245 transitions. Word has length 20 [2022-01-18 05:00:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:03,562 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1245 transitions. [2022-01-18 05:00:03,562 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 05:00:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1245 transitions. [2022-01-18 05:00:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:03,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:03,562 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 05:00:03,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 05:00:03,763 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 05:00:03,763 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1990060472, now seen corresponding path program 119 times [2022-01-18 05:00:03,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900906065] [2022-01-18 05:00:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:03,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:03,868 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 05:00:03,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:03,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900906065] [2022-01-18 05:00:03,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900906065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:03,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808902162] [2022-01-18 05:00:03,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:03,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:03,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:03,869 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 05:00:03,870 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 05:00:03,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:00:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:04,024 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 54 treesize of output 42 [2022-01-18 05:00:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:04,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:04,309 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 27 treesize of output 27 [2022-01-18 05:00:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808902162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:04,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330977109] [2022-01-18 05:00:04,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:04,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:04,333 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 05:00:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:04,588 INFO L93 Difference]: Finished difference Result 705 states and 2054 transitions. [2022-01-18 05:00:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:04,589 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 05:00:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:04,590 INFO L225 Difference]: With dead ends: 705 [2022-01-18 05:00:04,590 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 05:00:04,590 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 05:00:04,590 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 05:00:04,590 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 05:00:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 05:00:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 403. [2022-01-18 05:00:04,596 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 05:00:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1260 transitions. [2022-01-18 05:00:04,597 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1260 transitions. Word has length 20 [2022-01-18 05:00:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:04,597 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1260 transitions. [2022-01-18 05:00:04,597 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 05:00:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1260 transitions. [2022-01-18 05:00:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:04,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:04,597 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:04,613 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 05:00:04,803 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 05:00:04,803 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash -995684852, now seen corresponding path program 120 times [2022-01-18 05:00:04,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669244431] [2022-01-18 05:00:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:04,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:04,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669244431] [2022-01-18 05:00:04,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669244431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510630486] [2022-01-18 05:00:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:04,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:04,899 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 05:00:04,899 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 05:00:04,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:00:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:04,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:05,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:05,174 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 05:00:05,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:05,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:05,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:05,361 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 05:00:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510630486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:05,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:05,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:05,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102915225] [2022-01-18 05:00:05,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:05,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:05,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:05,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:05,362 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 05:00:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:05,647 INFO L93 Difference]: Finished difference Result 674 states and 1987 transitions. [2022-01-18 05:00:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:05,647 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 05:00:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:05,648 INFO L225 Difference]: With dead ends: 674 [2022-01-18 05:00:05,648 INFO L226 Difference]: Without dead ends: 674 [2022-01-18 05:00:05,648 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 05:00:05,648 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 05:00:05,648 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 05:00:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-18 05:00:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-01-18 05:00:05,653 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 05:00:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1245 transitions. [2022-01-18 05:00:05,654 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1245 transitions. Word has length 20 [2022-01-18 05:00:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1245 transitions. [2022-01-18 05:00:05,654 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 05:00:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1245 transitions. [2022-01-18 05:00:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:05,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:05,655 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 05:00:05,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:05,871 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 05:00:05,871 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -15231720, now seen corresponding path program 121 times [2022-01-18 05:00:05,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:05,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218284654] [2022-01-18 05:00:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:05,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:05,965 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 05:00:05,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218284654] [2022-01-18 05:00:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218284654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371069270] [2022-01-18 05:00:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:05,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:05,966 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 05:00:05,967 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 05:00:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:06,111 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 05:00:06,221 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 05:00:06,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:06,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:06,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371069270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:06,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:06,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:06,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280828453] [2022-01-18 05:00:06,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:06,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:06,375 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 05:00:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:06,595 INFO L93 Difference]: Finished difference Result 628 states and 1834 transitions. [2022-01-18 05:00:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:06,595 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 05:00:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:06,596 INFO L225 Difference]: With dead ends: 628 [2022-01-18 05:00:06,596 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 05:00:06,596 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 05:00:06,596 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 05:00:06,597 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 05:00:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 05:00:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 404. [2022-01-18 05:00:06,601 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 05:00:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1259 transitions. [2022-01-18 05:00:06,602 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1259 transitions. Word has length 20 [2022-01-18 05:00:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:06,602 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1259 transitions. [2022-01-18 05:00:06,602 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 05:00:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1259 transitions. [2022-01-18 05:00:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:06,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:06,602 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:06,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 05:00:06,805 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 05:00:06,805 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash 8668194, now seen corresponding path program 122 times [2022-01-18 05:00:06,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011966442] [2022-01-18 05:00:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:06,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:06,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011966442] [2022-01-18 05:00:06,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011966442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086561655] [2022-01-18 05:00:06,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:06,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:06,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:06,909 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 05:00:06,909 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 05:00:06,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:06,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:06,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:07,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:07,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:07,320 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 27 treesize of output 27 [2022-01-18 05:00:07,344 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 05:00:07,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086561655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:07,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:07,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:07,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548769775] [2022-01-18 05:00:07,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:07,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:07,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:07,344 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 05:00:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:07,628 INFO L93 Difference]: Finished difference Result 634 states and 1855 transitions. [2022-01-18 05:00:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:07,629 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 05:00:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:07,629 INFO L225 Difference]: With dead ends: 634 [2022-01-18 05:00:07,629 INFO L226 Difference]: Without dead ends: 634 [2022-01-18 05:00:07,630 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 05:00:07,630 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 05:00:07,630 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 05:00:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-18 05:00:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 399. [2022-01-18 05:00:07,634 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 05:00:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1241 transitions. [2022-01-18 05:00:07,635 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1241 transitions. Word has length 20 [2022-01-18 05:00:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:07,635 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1241 transitions. [2022-01-18 05:00:07,635 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 05:00:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1241 transitions. [2022-01-18 05:00:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:07,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:07,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:07,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:07,836 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 05:00:07,836 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash -806670848, now seen corresponding path program 123 times [2022-01-18 05:00:07,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:07,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643775891] [2022-01-18 05:00:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:07,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:07,929 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 05:00:07,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643775891] [2022-01-18 05:00:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643775891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597115377] [2022-01-18 05:00:07,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:07,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:07,930 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 05:00:07,930 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 05:00:08,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:08,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:08,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:08,096 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 24 treesize of output 18 [2022-01-18 05:00:08,150 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 05:00:08,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:08,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:08,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597115377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:08,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695775993] [2022-01-18 05:00:08,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:08,308 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 05:00:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:08,550 INFO L93 Difference]: Finished difference Result 552 states and 1662 transitions. [2022-01-18 05:00:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:08,551 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 05:00:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:08,551 INFO L225 Difference]: With dead ends: 552 [2022-01-18 05:00:08,551 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 05:00:08,551 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 05:00:08,552 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 05:00:08,552 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 05:00:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 05:00:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 394. [2022-01-18 05:00:08,556 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 05:00:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 05:00:08,556 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 05:00:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:08,556 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 05:00:08,557 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 05:00:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 05:00:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:08,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:08,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:08,573 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 05:00:08,758 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 05:00:08,758 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash 404487612, now seen corresponding path program 124 times [2022-01-18 05:00:08,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258581653] [2022-01-18 05:00:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:08,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:08,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258581653] [2022-01-18 05:00:08,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258581653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300848709] [2022-01-18 05:00:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:08,842 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 05:00:08,843 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 05:00:08,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:08,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:08,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:09,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:09,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:09,222 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 27 treesize of output 27 [2022-01-18 05:00:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:09,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300848709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:09,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:09,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:09,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713848886] [2022-01-18 05:00:09,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:09,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:09,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:09,246 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 05:00:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:09,512 INFO L93 Difference]: Finished difference Result 556 states and 1654 transitions. [2022-01-18 05:00:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:09,512 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 05:00:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:09,513 INFO L225 Difference]: With dead ends: 556 [2022-01-18 05:00:09,513 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 05:00:09,513 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 05:00:09,513 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 05:00:09,513 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 05:00:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 05:00:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 401. [2022-01-18 05:00:09,517 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 05:00:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1242 transitions. [2022-01-18 05:00:09,518 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1242 transitions. Word has length 20 [2022-01-18 05:00:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:09,518 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1242 transitions. [2022-01-18 05:00:09,518 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 05:00:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1242 transitions. [2022-01-18 05:00:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:09,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:09,519 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 05:00:09,534 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 05:00:09,719 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 05:00:09,719 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1678642466, now seen corresponding path program 125 times [2022-01-18 05:00:09,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:09,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155079869] [2022-01-18 05:00:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:09,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:09,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155079869] [2022-01-18 05:00:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155079869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210166625] [2022-01-18 05:00:09,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:09,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:09,829 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 05:00:09,829 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 05:00:09,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:09,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:10,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:10,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:10,207 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 05:00:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:10,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210166625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:10,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554781299] [2022-01-18 05:00:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:10,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:10,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:10,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:10,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:10,231 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 05:00:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:10,489 INFO L93 Difference]: Finished difference Result 513 states and 1557 transitions. [2022-01-18 05:00:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:10,489 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 05:00:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:10,490 INFO L225 Difference]: With dead ends: 513 [2022-01-18 05:00:10,490 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 05:00:10,490 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 05:00:10,490 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 05:00:10,490 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 05:00:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 05:00:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 384. [2022-01-18 05:00:10,494 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 05:00:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1181 transitions. [2022-01-18 05:00:10,495 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1181 transitions. Word has length 20 [2022-01-18 05:00:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:10,495 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1181 transitions. [2022-01-18 05:00:10,495 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 05:00:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1181 transitions. [2022-01-18 05:00:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:10,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:10,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:10,511 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 05:00:10,696 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 05:00:10,697 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1257912026, now seen corresponding path program 126 times [2022-01-18 05:00:10,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073447607] [2022-01-18 05:00:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:10,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:10,771 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 05:00:10,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073447607] [2022-01-18 05:00:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073447607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413258190] [2022-01-18 05:00:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:10,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:10,772 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 05:00:10,773 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 05:00:10,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:00:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:10,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:11,014 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 05:00:11,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:11,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:11,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:11,187 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 05:00:11,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413258190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:11,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:11,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621874099] [2022-01-18 05:00:11,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:11,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:11,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:11,188 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 05:00:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:11,412 INFO L93 Difference]: Finished difference Result 466 states and 1399 transitions. [2022-01-18 05:00:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:11,413 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 05:00:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:11,414 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:00:11,414 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 05:00:11,414 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 05:00:11,414 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 05:00:11,414 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 05:00:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 05:00:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 390. [2022-01-18 05:00:11,418 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 05:00:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2022-01-18 05:00:11,419 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 20 [2022-01-18 05:00:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:11,419 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2022-01-18 05:00:11,419 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 05:00:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2022-01-18 05:00:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:11,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:11,420 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 05:00:11,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 05:00:11,623 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 05:00:11,623 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 16242828, now seen corresponding path program 127 times [2022-01-18 05:00:11,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989575561] [2022-01-18 05:00:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:11,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:11,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:11,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989575561] [2022-01-18 05:00:11,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989575561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:11,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154781394] [2022-01-18 05:00:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:11,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:11,700 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 05:00:11,701 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 05:00:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:11,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:11,940 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 05:00:11,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:12,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:12,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:12,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154781394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:12,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:12,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:12,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113884794] [2022-01-18 05:00:12,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:12,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:12,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:12,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:12,123 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 05:00:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:12,349 INFO L93 Difference]: Finished difference Result 472 states and 1414 transitions. [2022-01-18 05:00:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:12,350 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 05:00:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:12,350 INFO L225 Difference]: With dead ends: 472 [2022-01-18 05:00:12,350 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:00:12,350 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 05:00:12,351 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 05:00:12,351 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 05:00:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:00:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 387. [2022-01-18 05:00:12,355 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 05:00:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1193 transitions. [2022-01-18 05:00:12,355 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1193 transitions. Word has length 20 [2022-01-18 05:00:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1193 transitions. [2022-01-18 05:00:12,356 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 05:00:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1193 transitions. [2022-01-18 05:00:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:12,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:12,356 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:12,372 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 05:00:12,557 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 05:00:12,557 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash 18868604, now seen corresponding path program 128 times [2022-01-18 05:00:12,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:12,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26779549] [2022-01-18 05:00:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:12,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:12,673 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 05:00:12,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26779549] [2022-01-18 05:00:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26779549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343202457] [2022-01-18 05:00:12,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:12,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:12,675 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 05:00:12,675 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 05:00:12,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:12,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:12,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:00:12,916 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-01-18 05:00:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:13,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:13,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:13,132 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 05:00:13,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343202457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:13,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:13,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:13,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691336681] [2022-01-18 05:00:13,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:13,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:13,133 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 05:00:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:13,401 INFO L93 Difference]: Finished difference Result 430 states and 1307 transitions. [2022-01-18 05:00:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:13,401 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 05:00:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:13,402 INFO L225 Difference]: With dead ends: 430 [2022-01-18 05:00:13,402 INFO L226 Difference]: Without dead ends: 430 [2022-01-18 05:00:13,402 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 05:00:13,402 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 05:00:13,403 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 05:00:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-18 05:00:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 389. [2022-01-18 05:00:13,406 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 05:00:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1200 transitions. [2022-01-18 05:00:13,407 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1200 transitions. Word has length 20 [2022-01-18 05:00:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:13,407 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1200 transitions. [2022-01-18 05:00:13,407 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 05:00:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1200 transitions. [2022-01-18 05:00:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:13,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:13,408 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:13,425 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 05:00:13,608 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 05:00:13,609 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 848874167, now seen corresponding path program 129 times [2022-01-18 05:00:13,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750803491] [2022-01-18 05:00:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:13,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:13,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750803491] [2022-01-18 05:00:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750803491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191674167] [2022-01-18 05:00:13,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:13,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:13,661 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 05:00:13,662 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 05:00:13,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:00:13,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:13,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:13,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:13,844 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 54 treesize of output 42 [2022-01-18 05:00:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:13,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:13,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:13,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:14,040 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 05:00:14,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191674167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:14,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:14,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:00:14,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578545609] [2022-01-18 05:00:14,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:14,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:00:14,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:00:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:00:14,040 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 05:00:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:14,295 INFO L93 Difference]: Finished difference Result 473 states and 1408 transitions. [2022-01-18 05:00:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:14,295 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 05:00:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:14,296 INFO L225 Difference]: With dead ends: 473 [2022-01-18 05:00:14,296 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 05:00:14,296 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 05:00:14,296 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 05:00:14,296 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 05:00:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 05:00:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 379. [2022-01-18 05:00:14,299 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 05:00:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1170 transitions. [2022-01-18 05:00:14,300 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1170 transitions. Word has length 20 [2022-01-18 05:00:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1170 transitions. [2022-01-18 05:00:14,300 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 05:00:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1170 transitions. [2022-01-18 05:00:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:14,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:14,301 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 05:00:14,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:14,502 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 05:00:14,502 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 291075782, now seen corresponding path program 130 times [2022-01-18 05:00:14,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716997611] [2022-01-18 05:00:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:14,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:14,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716997611] [2022-01-18 05:00:14,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716997611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551658757] [2022-01-18 05:00:14,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:14,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:14,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:14,603 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 05:00:14,603 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 05:00:14,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:14,806 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 63 treesize of output 49 [2022-01-18 05:00:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:15,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:15,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551658757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:15,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:15,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:15,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098482415] [2022-01-18 05:00:15,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:15,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:15,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:15,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:15,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:15,088 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 05:00:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:15,376 INFO L93 Difference]: Finished difference Result 594 states and 1707 transitions. [2022-01-18 05:00:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:15,377 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 05:00:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:15,377 INFO L225 Difference]: With dead ends: 594 [2022-01-18 05:00:15,378 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 05:00:15,378 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 05:00:15,378 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 05:00:15,378 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 05:00:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 05:00:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 389. [2022-01-18 05:00:15,382 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 05:00:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1215 transitions. [2022-01-18 05:00:15,383 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1215 transitions. Word has length 20 [2022-01-18 05:00:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:15,383 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1215 transitions. [2022-01-18 05:00:15,384 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 05:00:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1215 transitions. [2022-01-18 05:00:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:15,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:15,384 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:15,401 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 05:00:15,584 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 05:00:15,585 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1173153216, now seen corresponding path program 131 times [2022-01-18 05:00:15,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:15,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159332689] [2022-01-18 05:00:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:15,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:15,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:15,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159332689] [2022-01-18 05:00:15,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159332689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:15,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914204101] [2022-01-18 05:00:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:15,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:15,687 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 05:00:15,688 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 05:00:15,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:00:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:15,895 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 57 treesize of output 45 [2022-01-18 05:00:15,986 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 05:00:15,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:16,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:16,137 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 27 treesize of output 27 [2022-01-18 05:00:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:16,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914204101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:16,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:16,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:16,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634013608] [2022-01-18 05:00:16,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:16,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:16,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:16,161 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 05:00:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:16,387 INFO L93 Difference]: Finished difference Result 528 states and 1553 transitions. [2022-01-18 05:00:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:16,388 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 05:00:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:16,388 INFO L225 Difference]: With dead ends: 528 [2022-01-18 05:00:16,388 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 05:00:16,389 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 05:00:16,389 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 05:00:16,389 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 05:00:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 05:00:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2022-01-18 05:00:16,393 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 05:00:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1217 transitions. [2022-01-18 05:00:16,394 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1217 transitions. Word has length 20 [2022-01-18 05:00:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:16,394 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1217 transitions. [2022-01-18 05:00:16,394 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 05:00:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1217 transitions. [2022-01-18 05:00:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:16,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:16,394 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:16,410 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 05:00:16,594 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 05:00:16,595 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1031973116, now seen corresponding path program 132 times [2022-01-18 05:00:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:16,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986175287] [2022-01-18 05:00:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:16,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:16,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986175287] [2022-01-18 05:00:16,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986175287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:16,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047557150] [2022-01-18 05:00:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:16,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:16,696 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 05:00:16,697 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 05:00:16,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:00:16,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:16,906 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 63 treesize of output 49 [2022-01-18 05:00:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:17,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:17,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:17,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:17,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047557150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:17,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:17,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:17,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604353974] [2022-01-18 05:00:17,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:17,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:17,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:17,201 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 05:00:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:17,555 INFO L93 Difference]: Finished difference Result 599 states and 1751 transitions. [2022-01-18 05:00:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:17,555 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 05:00:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:17,556 INFO L225 Difference]: With dead ends: 599 [2022-01-18 05:00:17,556 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 05:00:17,556 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 05:00:17,556 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 05:00:17,557 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 05:00:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 05:00:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 395. [2022-01-18 05:00:17,561 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 05:00:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1232 transitions. [2022-01-18 05:00:17,562 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1232 transitions. Word has length 20 [2022-01-18 05:00:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1232 transitions. [2022-01-18 05:00:17,562 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 05:00:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1232 transitions. [2022-01-18 05:00:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:17,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:17,562 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 05:00:17,578 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 05:00:17,763 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 05:00:17,763 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2026348736, now seen corresponding path program 133 times [2022-01-18 05:00:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147079330] [2022-01-18 05:00:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:17,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:17,864 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 05:00:17,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:17,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147079330] [2022-01-18 05:00:17,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147079330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:17,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254540515] [2022-01-18 05:00:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:17,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:17,865 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 05:00:17,866 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 05:00:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:18,049 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 57 treesize of output 45 [2022-01-18 05:00:18,137 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 05:00:18,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:18,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:18,317 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 27 treesize of output 27 [2022-01-18 05:00:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:18,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254540515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:18,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:18,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:18,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001617722] [2022-01-18 05:00:18,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:18,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:18,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:18,345 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 05:00:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:18,674 INFO L93 Difference]: Finished difference Result 568 states and 1684 transitions. [2022-01-18 05:00:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:18,675 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 05:00:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:18,675 INFO L225 Difference]: With dead ends: 568 [2022-01-18 05:00:18,676 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 05:00:18,676 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 05:00:18,676 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 05:00:18,676 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 05:00:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 05:00:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 392. [2022-01-18 05:00:18,680 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 05:00:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1217 transitions. [2022-01-18 05:00:18,681 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1217 transitions. Word has length 20 [2022-01-18 05:00:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1217 transitions. [2022-01-18 05:00:18,681 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 05:00:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1217 transitions. [2022-01-18 05:00:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:18,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:18,681 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 05:00:18,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:18,882 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 05:00:18,882 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1288165428, now seen corresponding path program 134 times [2022-01-18 05:00:18,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:18,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637904745] [2022-01-18 05:00:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:18,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:18,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637904745] [2022-01-18 05:00:18,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637904745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245969867] [2022-01-18 05:00:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:18,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:18,978 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 05:00:18,979 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 05:00:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:19,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:19,171 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 57 treesize of output 45 [2022-01-18 05:00:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:19,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:19,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:19,432 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 05:00:19,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245969867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:19,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:19,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:19,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525817856] [2022-01-18 05:00:19,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:19,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:19,432 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 05:00:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:19,741 INFO L93 Difference]: Finished difference Result 565 states and 1632 transitions. [2022-01-18 05:00:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:19,741 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 05:00:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:19,742 INFO L225 Difference]: With dead ends: 565 [2022-01-18 05:00:19,742 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 05:00:19,742 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 05:00:19,742 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 05:00:19,742 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 05:00:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 05:00:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 396. [2022-01-18 05:00:19,746 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 05:00:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1231 transitions. [2022-01-18 05:00:19,747 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1231 transitions. Word has length 20 [2022-01-18 05:00:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:19,747 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1231 transitions. [2022-01-18 05:00:19,747 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 05:00:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1231 transitions. [2022-01-18 05:00:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:19,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:19,748 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 05:00:19,764 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 05:00:19,951 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 05:00:19,951 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1264265514, now seen corresponding path program 135 times [2022-01-18 05:00:19,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377715098] [2022-01-18 05:00:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:19,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:20,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377715098] [2022-01-18 05:00:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377715098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78247804] [2022-01-18 05:00:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:20,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:20,132 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 05:00:20,133 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 05:00:20,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:20,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:20,337 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 63 treesize of output 49 [2022-01-18 05:00:20,424 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 05:00:20,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:20,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:20,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:20,606 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 05:00:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78247804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:20,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:20,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866485429] [2022-01-18 05:00:20,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:20,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:20,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:20,607 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 05:00:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:20,966 INFO L93 Difference]: Finished difference Result 571 states and 1653 transitions. [2022-01-18 05:00:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:00:20,966 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 05:00:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:20,967 INFO L225 Difference]: With dead ends: 571 [2022-01-18 05:00:20,967 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 05:00:20,968 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 05:00:20,968 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 05:00:20,968 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 05:00:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 05:00:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 393. [2022-01-18 05:00:20,972 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 05:00:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1221 transitions. [2022-01-18 05:00:20,973 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1221 transitions. Word has length 20 [2022-01-18 05:00:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:20,973 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1221 transitions. [2022-01-18 05:00:20,973 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 05:00:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1221 transitions. [2022-01-18 05:00:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:20,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:20,974 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 05:00:20,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 05:00:21,174 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 05:00:21,174 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash -235484062, now seen corresponding path program 136 times [2022-01-18 05:00:21,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:21,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084497828] [2022-01-18 05:00:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:21,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:21,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084497828] [2022-01-18 05:00:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084497828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358650994] [2022-01-18 05:00:21,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:21,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:21,262 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 05:00:21,263 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 05:00:21,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:21,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:21,496 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 62 treesize of output 48 [2022-01-18 05:00:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:21,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:21,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:21,751 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 05:00:21,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358650994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:21,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:21,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:21,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422021302] [2022-01-18 05:00:21,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:21,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:21,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:21,752 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 05:00:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:21,989 INFO L93 Difference]: Finished difference Result 504 states and 1510 transitions. [2022-01-18 05:00:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:21,989 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 05:00:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:21,990 INFO L225 Difference]: With dead ends: 504 [2022-01-18 05:00:21,990 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 05:00:21,990 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 05:00:21,990 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 05:00:21,990 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 05:00:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 05:00:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2022-01-18 05:00:21,994 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 05:00:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 05:00:21,995 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 05:00:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:21,995 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 05:00:21,995 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 05:00:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 05:00:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:21,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:21,995 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 05:00:22,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 05:00:22,196 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 05:00:22,196 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 758891558, now seen corresponding path program 137 times [2022-01-18 05:00:22,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995506130] [2022-01-18 05:00:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:22,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:22,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:22,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995506130] [2022-01-18 05:00:22,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995506130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:22,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819480023] [2022-01-18 05:00:22,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:22,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:22,291 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 05:00:22,292 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 05:00:22,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:22,528 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 62 treesize of output 48 [2022-01-18 05:00:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:22,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:22,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819480023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:22,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:22,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415563923] [2022-01-18 05:00:22,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:22,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:22,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:22,802 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 05:00:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:23,101 INFO L93 Difference]: Finished difference Result 498 states and 1492 transitions. [2022-01-18 05:00:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:23,102 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 05:00:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:23,102 INFO L225 Difference]: With dead ends: 498 [2022-01-18 05:00:23,102 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 05:00:23,103 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 05:00:23,103 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 05:00:23,103 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 05:00:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 05:00:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 383. [2022-01-18 05:00:23,106 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 05:00:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1186 transitions. [2022-01-18 05:00:23,107 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1186 transitions. Word has length 20 [2022-01-18 05:00:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:23,107 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1186 transitions. [2022-01-18 05:00:23,107 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 05:00:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1186 transitions. [2022-01-18 05:00:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:23,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:23,108 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 05:00:23,124 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 05:00:23,308 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 05:00:23,308 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 463464376, now seen corresponding path program 138 times [2022-01-18 05:00:23,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:23,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087303901] [2022-01-18 05:00:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:23,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:23,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:23,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087303901] [2022-01-18 05:00:23,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087303901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008733699] [2022-01-18 05:00:23,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:23,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:23,404 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 05:00:23,405 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 05:00:23,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:00:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:23,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:23,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:23,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008733699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:23,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534039697] [2022-01-18 05:00:23,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:23,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:23,871 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 05:00:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:24,109 INFO L93 Difference]: Finished difference Result 459 states and 1385 transitions. [2022-01-18 05:00:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:24,110 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 05:00:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:24,110 INFO L225 Difference]: With dead ends: 459 [2022-01-18 05:00:24,110 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 05:00:24,111 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 05:00:24,111 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 05:00:24,111 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 05:00:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 05:00:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 380. [2022-01-18 05:00:24,114 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 05:00:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1174 transitions. [2022-01-18 05:00:24,115 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1174 transitions. Word has length 20 [2022-01-18 05:00:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:24,115 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1174 transitions. [2022-01-18 05:00:24,115 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 05:00:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1174 transitions. [2022-01-18 05:00:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:24,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:24,116 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 05:00:24,131 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 05:00:24,316 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 05:00:24,316 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -373083940, now seen corresponding path program 139 times [2022-01-18 05:00:24,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473210107] [2022-01-18 05:00:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:24,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:24,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473210107] [2022-01-18 05:00:24,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473210107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3294399] [2022-01-18 05:00:24,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:24,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:24,393 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 05:00:24,393 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 05:00:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:24,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:24,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:24,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:24,805 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 05:00:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:24,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3294399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:24,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:24,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:24,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960538158] [2022-01-18 05:00:24,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:24,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:24,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:24,830 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 05:00:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:25,055 INFO L93 Difference]: Finished difference Result 466 states and 1375 transitions. [2022-01-18 05:00:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:25,055 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 05:00:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:25,056 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:00:25,056 INFO L226 Difference]: Without dead ends: 460 [2022-01-18 05:00:25,056 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 05:00:25,056 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 05:00:25,056 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 05:00:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-18 05:00:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 394. [2022-01-18 05:00:25,060 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 05:00:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1213 transitions. [2022-01-18 05:00:25,061 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1213 transitions. Word has length 20 [2022-01-18 05:00:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:25,061 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1213 transitions. [2022-01-18 05:00:25,061 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 05:00:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1213 transitions. [2022-01-18 05:00:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:25,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:25,062 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:25,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 05:00:25,262 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 05:00:25,262 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -349184026, now seen corresponding path program 140 times [2022-01-18 05:00:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053270073] [2022-01-18 05:00:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:25,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:25,351 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 05:00:25,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053270073] [2022-01-18 05:00:25,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053270073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871562751] [2022-01-18 05:00:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:25,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:25,352 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 05:00:25,353 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 05:00:25,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:25,572 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 54 treesize of output 42 [2022-01-18 05:00:25,624 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 05:00:25,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:25,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:25,774 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 27 treesize of output 27 [2022-01-18 05:00:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:25,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871562751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:25,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:25,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:25,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451691800] [2022-01-18 05:00:25,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:25,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:25,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:25,799 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 05:00:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:26,070 INFO L93 Difference]: Finished difference Result 472 states and 1396 transitions. [2022-01-18 05:00:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:26,071 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 05:00:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:26,071 INFO L225 Difference]: With dead ends: 472 [2022-01-18 05:00:26,071 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:00:26,072 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 05:00:26,072 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 05:00:26,072 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 05:00:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:00:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 392. [2022-01-18 05:00:26,076 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 05:00:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1208 transitions. [2022-01-18 05:00:26,076 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1208 transitions. Word has length 20 [2022-01-18 05:00:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:26,076 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1208 transitions. [2022-01-18 05:00:26,076 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 05:00:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1208 transitions. [2022-01-18 05:00:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:26,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:26,077 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 05:00:26,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 05:00:26,277 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 05:00:26,277 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1133950912, now seen corresponding path program 141 times [2022-01-18 05:00:26,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:26,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809502666] [2022-01-18 05:00:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:26,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:26,384 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 05:00:26,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809502666] [2022-01-18 05:00:26,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809502666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189118500] [2022-01-18 05:00:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:26,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:26,385 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 05:00:26,386 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 05:00:26,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:26,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:26,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:26,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:26,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:26,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:26,791 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 05:00:26,814 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 05:00:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189118500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:26,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:26,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:26,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392216733] [2022-01-18 05:00:26,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:26,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:26,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:26,815 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 05:00:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:27,061 INFO L93 Difference]: Finished difference Result 441 states and 1331 transitions. [2022-01-18 05:00:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:27,061 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 05:00:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:27,062 INFO L225 Difference]: With dead ends: 441 [2022-01-18 05:00:27,062 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 05:00:27,062 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 05:00:27,062 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 05:00:27,062 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 05:00:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 05:00:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 382. [2022-01-18 05:00:27,066 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 05:00:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1179 transitions. [2022-01-18 05:00:27,066 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1179 transitions. Word has length 20 [2022-01-18 05:00:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:27,066 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1179 transitions. [2022-01-18 05:00:27,066 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 05:00:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1179 transitions. [2022-01-18 05:00:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:27,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:27,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:27,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:27,267 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 05:00:27,267 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1178925768, now seen corresponding path program 142 times [2022-01-18 05:00:27,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:27,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960547744] [2022-01-18 05:00:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:27,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:27,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960547744] [2022-01-18 05:00:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960547744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185535806] [2022-01-18 05:00:27,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:27,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:27,407 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 05:00:27,408 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 05:00:27,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:27,786 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 72 treesize of output 56 [2022-01-18 05:00:27,864 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 05:00:27,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:27,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:27,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185535806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:28,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:28,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:28,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735251490] [2022-01-18 05:00:28,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:28,095 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 05:00:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:28,460 INFO L93 Difference]: Finished difference Result 461 states and 1376 transitions. [2022-01-18 05:00:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:28,460 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 05:00:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:28,461 INFO L225 Difference]: With dead ends: 461 [2022-01-18 05:00:28,461 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 05:00:28,461 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 05:00:28,461 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 05:00:28,461 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 05:00:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 05:00:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 390. [2022-01-18 05:00:28,465 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 05:00:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1210 transitions. [2022-01-18 05:00:28,466 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1210 transitions. Word has length 20 [2022-01-18 05:00:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1210 transitions. [2022-01-18 05:00:28,466 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 05:00:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1210 transitions. [2022-01-18 05:00:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:28,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:28,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:28,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:28,667 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 05:00:28,667 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2061003202, now seen corresponding path program 143 times [2022-01-18 05:00:28,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:28,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695891775] [2022-01-18 05:00:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:28,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:28,770 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 05:00:28,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695891775] [2022-01-18 05:00:28,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695891775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156308644] [2022-01-18 05:00:28,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:28,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:28,771 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 05:00:28,771 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 05:00:28,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:28,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:29,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:29,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:29,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:29,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:29,387 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 05:00:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156308644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:29,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:29,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:29,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68918505] [2022-01-18 05:00:29,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:29,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:29,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:29,388 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 05:00:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:29,720 INFO L93 Difference]: Finished difference Result 467 states and 1383 transitions. [2022-01-18 05:00:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:29,720 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 05:00:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:29,721 INFO L225 Difference]: With dead ends: 467 [2022-01-18 05:00:29,721 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 05:00:29,721 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 05:00:29,721 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 05:00:29,721 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 05:00:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 05:00:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 387. [2022-01-18 05:00:29,725 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 05:00:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1199 transitions. [2022-01-18 05:00:29,726 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1199 transitions. Word has length 20 [2022-01-18 05:00:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:29,726 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1199 transitions. [2022-01-18 05:00:29,726 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 05:00:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1199 transitions. [2022-01-18 05:00:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:29,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:29,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:29,742 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 05:00:29,927 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 05:00:29,927 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1525773400, now seen corresponding path program 144 times [2022-01-18 05:00:29,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128833726] [2022-01-18 05:00:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:29,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:29,998 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 05:00:29,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:29,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128833726] [2022-01-18 05:00:29,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128833726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:29,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528955713] [2022-01-18 05:00:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:29,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:29,999 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 05:00:30,000 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 05:00:30,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:00:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:30,307 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 05:00:30,325 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 05:00:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:30,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:30,411 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 49 treesize of output 45 [2022-01-18 05:00:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:30,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528955713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:30,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:30,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:00:30,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326529884] [2022-01-18 05:00:30,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:30,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:00:30,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:00:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:00:30,531 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 05:00:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:30,792 INFO L93 Difference]: Finished difference Result 431 states and 1301 transitions. [2022-01-18 05:00:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:30,792 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 05:00:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:30,793 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:00:30,793 INFO L226 Difference]: Without dead ends: 419 [2022-01-18 05:00:30,793 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 05:00:30,793 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 05:00:30,793 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 05:00:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-18 05:00:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 384. [2022-01-18 05:00:30,797 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 05:00:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1188 transitions. [2022-01-18 05:00:30,798 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1188 transitions. Word has length 20 [2022-01-18 05:00:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:30,798 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1188 transitions. [2022-01-18 05:00:30,798 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 05:00:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1188 transitions. [2022-01-18 05:00:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:30,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:30,798 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 05:00:30,814 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 05:00:31,015 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 05:00:31,015 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1623060654, now seen corresponding path program 145 times [2022-01-18 05:00:31,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:31,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483871733] [2022-01-18 05:00:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:31,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:31,117 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 05:00:31,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483871733] [2022-01-18 05:00:31,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483871733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465870547] [2022-01-18 05:00:31,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:31,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:31,118 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 05:00:31,119 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 05:00:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:31,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:31,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:31,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:31,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465870547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:31,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:31,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:31,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232467137] [2022-01-18 05:00:31,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:31,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:31,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:31,721 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 05:00:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:32,081 INFO L93 Difference]: Finished difference Result 548 states and 1594 transitions. [2022-01-18 05:00:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:32,081 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 05:00:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:32,082 INFO L225 Difference]: With dead ends: 548 [2022-01-18 05:00:32,082 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 05:00:32,082 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 05:00:32,083 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 05:00:32,083 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 05:00:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 05:00:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 392. [2022-01-18 05:00:32,087 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 05:00:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1224 transitions. [2022-01-18 05:00:32,088 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1224 transitions. Word has length 20 [2022-01-18 05:00:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1224 transitions. [2022-01-18 05:00:32,088 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 05:00:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1224 transitions. [2022-01-18 05:00:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:32,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:32,088 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:32,105 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 05:00:32,289 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 05:00:32,289 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash -740983220, now seen corresponding path program 146 times [2022-01-18 05:00:32,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302487940] [2022-01-18 05:00:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:32,393 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 05:00:32,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302487940] [2022-01-18 05:00:32,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302487940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274822624] [2022-01-18 05:00:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:32,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:32,394 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 05:00:32,394 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 05:00:32,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:32,657 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 93 treesize of output 73 [2022-01-18 05:00:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:32,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:32,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:32,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:33,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274822624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:33,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:33,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:33,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691170699] [2022-01-18 05:00:33,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:33,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:33,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:33,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:33,004 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 05:00:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:33,441 INFO L93 Difference]: Finished difference Result 577 states and 1640 transitions. [2022-01-18 05:00:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:00:33,441 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 05:00:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:33,442 INFO L225 Difference]: With dead ends: 577 [2022-01-18 05:00:33,442 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 05:00:33,442 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 05:00:33,442 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 05:00:33,442 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 05:00:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 05:00:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 395. [2022-01-18 05:00:33,447 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 05:00:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1226 transitions. [2022-01-18 05:00:33,448 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1226 transitions. Word has length 20 [2022-01-18 05:00:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:33,448 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1226 transitions. [2022-01-18 05:00:33,448 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 05:00:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1226 transitions. [2022-01-18 05:00:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:33,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:33,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:33,464 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 05:00:33,649 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 05:00:33,649 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -882163320, now seen corresponding path program 147 times [2022-01-18 05:00:33,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:33,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767678270] [2022-01-18 05:00:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:33,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:33,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767678270] [2022-01-18 05:00:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767678270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288061504] [2022-01-18 05:00:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:33,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:33,757 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 05:00:33,757 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 05:00:33,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:34,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:34,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:34,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:34,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288061504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:34,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:34,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:34,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260152598] [2022-01-18 05:00:34,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:34,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:34,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:34,413 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 05:00:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:34,781 INFO L93 Difference]: Finished difference Result 545 states and 1581 transitions. [2022-01-18 05:00:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:34,782 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 05:00:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:34,782 INFO L225 Difference]: With dead ends: 545 [2022-01-18 05:00:34,782 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 05:00:34,783 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 05:00:34,783 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 05:00:34,783 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 05:00:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 05:00:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 388. [2022-01-18 05:00:34,787 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 05:00:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1208 transitions. [2022-01-18 05:00:34,788 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1208 transitions. Word has length 20 [2022-01-18 05:00:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:34,788 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1208 transitions. [2022-01-18 05:00:34,788 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 05:00:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1208 transitions. [2022-01-18 05:00:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:34,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:34,788 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 05:00:34,805 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 05:00:34,989 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 05:00:34,989 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 112212300, now seen corresponding path program 148 times [2022-01-18 05:00:34,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834047516] [2022-01-18 05:00:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:34,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:35,100 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 05:00:35,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834047516] [2022-01-18 05:00:35,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834047516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:35,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942811707] [2022-01-18 05:00:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:35,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:35,102 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 05:00:35,102 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 05:00:35,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:35,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:35,458 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 05:00:35,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:35,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:35,575 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 05:00:35,697 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 05:00:35,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942811707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:35,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:35,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:35,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778896384] [2022-01-18 05:00:35,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:35,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:35,698 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 05:00:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:36,035 INFO L93 Difference]: Finished difference Result 512 states and 1504 transitions. [2022-01-18 05:00:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:36,035 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 05:00:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:36,036 INFO L225 Difference]: With dead ends: 512 [2022-01-18 05:00:36,036 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 05:00:36,036 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 05:00:36,036 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 05:00:36,037 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 05:00:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 05:00:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 385. [2022-01-18 05:00:36,040 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 05:00:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1193 transitions. [2022-01-18 05:00:36,041 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1193 transitions. Word has length 20 [2022-01-18 05:00:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:36,041 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1193 transitions. [2022-01-18 05:00:36,041 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 05:00:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1193 transitions. [2022-01-18 05:00:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:36,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:36,042 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 05:00:36,058 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 05:00:36,242 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 05:00:36,242 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1092665432, now seen corresponding path program 149 times [2022-01-18 05:00:36,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:36,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834467997] [2022-01-18 05:00:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:36,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:36,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834467997] [2022-01-18 05:00:36,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834467997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112755790] [2022-01-18 05:00:36,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:36,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:36,345 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 05:00:36,345 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 05:00:36,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:36,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:36,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:36,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:36,802 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 05:00:36,915 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 05:00:36,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112755790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:36,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:36,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:36,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205943824] [2022-01-18 05:00:36,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:36,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:36,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:36,916 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 05:00:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:37,380 INFO L93 Difference]: Finished difference Result 522 states and 1522 transitions. [2022-01-18 05:00:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:00:37,381 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 05:00:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:37,381 INFO L225 Difference]: With dead ends: 522 [2022-01-18 05:00:37,381 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 05:00:37,382 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 05:00:37,382 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 05:00:37,382 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 05:00:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 05:00:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 395. [2022-01-18 05:00:37,386 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 05:00:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1220 transitions. [2022-01-18 05:00:37,387 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1220 transitions. Word has length 20 [2022-01-18 05:00:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1220 transitions. [2022-01-18 05:00:37,387 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 05:00:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1220 transitions. [2022-01-18 05:00:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:37,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:37,388 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 05:00:37,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:37,589 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 05:00:37,590 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1116565346, now seen corresponding path program 150 times [2022-01-18 05:00:37,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122995507] [2022-01-18 05:00:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:37,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:37,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122995507] [2022-01-18 05:00:37,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122995507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463096491] [2022-01-18 05:00:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:37,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:37,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:37,700 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 05:00:37,701 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 05:00:37,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:00:37,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:37,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:38,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:38,113 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 05:00:38,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:38,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:38,239 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 05:00:38,356 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 05:00:38,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463096491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:38,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:38,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:38,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125212011] [2022-01-18 05:00:38,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:38,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:38,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:38,357 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 05:00:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:38,734 INFO L93 Difference]: Finished difference Result 493 states and 1468 transitions. [2022-01-18 05:00:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:38,734 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 05:00:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:38,735 INFO L225 Difference]: With dead ends: 493 [2022-01-18 05:00:38,735 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 05:00:38,735 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 05:00:38,735 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 05:00:38,735 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 05:00:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 05:00:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 384. [2022-01-18 05:00:38,739 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 05:00:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1188 transitions. [2022-01-18 05:00:38,739 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1188 transitions. Word has length 20 [2022-01-18 05:00:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:38,740 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1188 transitions. [2022-01-18 05:00:38,740 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 05:00:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1188 transitions. [2022-01-18 05:00:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:38,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:38,740 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:38,756 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 05:00:38,940 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 05:00:38,941 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1760660532, now seen corresponding path program 151 times [2022-01-18 05:00:38,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:38,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145056405] [2022-01-18 05:00:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:38,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:39,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145056405] [2022-01-18 05:00:39,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145056405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146069864] [2022-01-18 05:00:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:39,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:39,008 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 05:00:39,009 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 05:00:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:39,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:39,340 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 05:00:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:39,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:39,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146069864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:39,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:00:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465762579] [2022-01-18 05:00:39,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:39,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:00:39,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:00:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:00:39,541 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 05:00:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:39,793 INFO L93 Difference]: Finished difference Result 433 states and 1305 transitions. [2022-01-18 05:00:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:39,793 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 05:00:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:39,794 INFO L225 Difference]: With dead ends: 433 [2022-01-18 05:00:39,794 INFO L226 Difference]: Without dead ends: 421 [2022-01-18 05:00:39,794 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 05:00:39,794 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 05:00:39,794 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 05:00:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-18 05:00:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 386. [2022-01-18 05:00:39,798 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 05:00:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1193 transitions. [2022-01-18 05:00:39,798 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1193 transitions. Word has length 20 [2022-01-18 05:00:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:39,798 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1193 transitions. [2022-01-18 05:00:39,799 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 05:00:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1193 transitions. [2022-01-18 05:00:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:39,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:39,799 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 05:00:39,815 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 05:00:39,999 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 05:00:40,000 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1019763198, now seen corresponding path program 152 times [2022-01-18 05:00:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140315237] [2022-01-18 05:00:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:40,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:40,090 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 05:00:40,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140315237] [2022-01-18 05:00:40,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140315237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367288425] [2022-01-18 05:00:40,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:40,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:40,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:40,092 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 05:00:40,093 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 05:00:40,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:40,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:40,424 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 75 treesize of output 59 [2022-01-18 05:00:40,502 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 05:00:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:40,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:40,598 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 49 treesize of output 45 [2022-01-18 05:00:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367288425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:40,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:40,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:40,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952691312] [2022-01-18 05:00:40,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:40,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:40,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:40,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:40,722 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 05:00:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:41,116 INFO L93 Difference]: Finished difference Result 458 states and 1357 transitions. [2022-01-18 05:00:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:41,116 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 05:00:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:41,117 INFO L225 Difference]: With dead ends: 458 [2022-01-18 05:00:41,117 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:00:41,117 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 05:00:41,117 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 05:00:41,117 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 05:00:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:00:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 396. [2022-01-18 05:00:41,121 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 05:00:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1220 transitions. [2022-01-18 05:00:41,122 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1220 transitions. Word has length 20 [2022-01-18 05:00:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:41,122 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1220 transitions. [2022-01-18 05:00:41,122 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 05:00:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1220 transitions. [2022-01-18 05:00:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:41,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:41,122 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:41,138 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 05:00:41,323 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 05:00:41,323 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:41,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash -995863284, now seen corresponding path program 153 times [2022-01-18 05:00:41,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:41,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016473215] [2022-01-18 05:00:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:41,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:41,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:41,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016473215] [2022-01-18 05:00:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016473215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:41,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157969242] [2022-01-18 05:00:41,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:41,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:41,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:41,403 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 05:00:41,404 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 05:00:41,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:41,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:41,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:41,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:41,693 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 72 treesize of output 56 [2022-01-18 05:00:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:41,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:41,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:41,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:41,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157969242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:41,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:41,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:00:41,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474742086] [2022-01-18 05:00:41,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:41,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:00:41,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:00:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:00:41,980 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 05:00:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:42,193 INFO L93 Difference]: Finished difference Result 429 states and 1303 transitions. [2022-01-18 05:00:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:42,194 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 05:00:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:42,194 INFO L225 Difference]: With dead ends: 429 [2022-01-18 05:00:42,194 INFO L226 Difference]: Without dead ends: 429 [2022-01-18 05:00:42,195 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 05:00:42,195 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 05:00:42,195 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 05:00:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-18 05:00:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 383. [2022-01-18 05:00:42,198 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 05:00:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1183 transitions. [2022-01-18 05:00:42,199 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1183 transitions. Word has length 20 [2022-01-18 05:00:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1183 transitions. [2022-01-18 05:00:42,199 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 05:00:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1183 transitions. [2022-01-18 05:00:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:42,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:42,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:42,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:42,401 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 05:00:42,401 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2035439788, now seen corresponding path program 154 times [2022-01-18 05:00:42,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040447111] [2022-01-18 05:00:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:42,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040447111] [2022-01-18 05:00:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040447111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256526585] [2022-01-18 05:00:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:42,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:42,500 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 05:00:42,501 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 05:00:42,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:42,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:42,780 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 63 treesize of output 49 [2022-01-18 05:00:42,874 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 05:00:42,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:43,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:43,021 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 27 treesize of output 27 [2022-01-18 05:00:43,075 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 05:00:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256526585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:43,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:43,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531565930] [2022-01-18 05:00:43,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:43,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:43,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:43,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:43,075 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 05:00:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:43,318 INFO L93 Difference]: Finished difference Result 506 states and 1505 transitions. [2022-01-18 05:00:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:43,319 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 05:00:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:43,319 INFO L225 Difference]: With dead ends: 506 [2022-01-18 05:00:43,319 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 05:00:43,320 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 05:00:43,320 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:00:43,320 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 05:00:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 05:00:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 393. [2022-01-18 05:00:43,324 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 05:00:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1228 transitions. [2022-01-18 05:00:43,324 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1228 transitions. Word has length 20 [2022-01-18 05:00:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:43,325 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1228 transitions. [2022-01-18 05:00:43,325 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 05:00:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1228 transitions. [2022-01-18 05:00:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:43,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:43,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:43,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:43,541 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 05:00:43,542 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1377450074, now seen corresponding path program 155 times [2022-01-18 05:00:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:43,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719854178] [2022-01-18 05:00:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:43,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:43,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:43,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719854178] [2022-01-18 05:00:43,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719854178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:43,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302281002] [2022-01-18 05:00:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:43,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:43,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:43,653 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 05:00:43,653 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 05:00:43,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:00:43,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:43,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:43,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:43,985 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 05:00:43,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:44,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:44,118 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 27 treesize of output 27 [2022-01-18 05:00:44,170 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 05:00:44,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302281002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:44,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:44,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:44,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274977979] [2022-01-18 05:00:44,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:44,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:44,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:44,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:44,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:44,171 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 05:00:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:44,407 INFO L93 Difference]: Finished difference Result 535 states and 1551 transitions. [2022-01-18 05:00:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:44,407 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 05:00:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:44,408 INFO L225 Difference]: With dead ends: 535 [2022-01-18 05:00:44,408 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 05:00:44,408 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 05:00:44,408 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 05:00:44,409 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 05:00:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 05:00:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 396. [2022-01-18 05:00:44,413 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 05:00:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 05:00:44,413 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 05:00:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:44,413 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 05:00:44,413 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 05:00:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 05:00:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:44,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:44,414 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:44,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:44,614 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 05:00:44,614 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1518630174, now seen corresponding path program 156 times [2022-01-18 05:00:44,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:44,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535770150] [2022-01-18 05:00:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:44,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:44,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535770150] [2022-01-18 05:00:44,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535770150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456128644] [2022-01-18 05:00:44,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:44,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:44,724 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 05:00:44,725 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 05:00:44,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:00:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:44,977 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 57 treesize of output 45 [2022-01-18 05:00:45,070 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 05:00:45,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:45,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:45,217 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 05:00:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:45,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456128644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:45,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:45,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:45,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978445513] [2022-01-18 05:00:45,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:45,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:45,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:45,271 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 05:00:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:45,602 INFO L93 Difference]: Finished difference Result 564 states and 1648 transitions. [2022-01-18 05:00:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:45,602 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 05:00:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:45,604 INFO L225 Difference]: With dead ends: 564 [2022-01-18 05:00:45,604 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 05:00:45,604 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 05:00:45,604 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 05:00:45,604 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 05:00:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 05:00:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 399. [2022-01-18 05:00:45,608 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 05:00:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1245 transitions. [2022-01-18 05:00:45,609 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1245 transitions. Word has length 20 [2022-01-18 05:00:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:45,609 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1245 transitions. [2022-01-18 05:00:45,609 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 05:00:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1245 transitions. [2022-01-18 05:00:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:45,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:45,610 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:45,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:45,823 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 05:00:45,823 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -524254554, now seen corresponding path program 157 times [2022-01-18 05:00:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:45,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972303375] [2022-01-18 05:00:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:45,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:45,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972303375] [2022-01-18 05:00:45,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972303375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438478209] [2022-01-18 05:00:45,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:45,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:45,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:45,928 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 05:00:45,929 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 05:00:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:46,229 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 63 treesize of output 49 [2022-01-18 05:00:46,330 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 05:00:46,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:46,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:46,486 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 27 treesize of output 27 [2022-01-18 05:00:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:46,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438478209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:46,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:46,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:46,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235776623] [2022-01-18 05:00:46,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:46,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:46,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:46,550 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 05:00:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:46,912 INFO L93 Difference]: Finished difference Result 560 states and 1637 transitions. [2022-01-18 05:00:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:00:46,913 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 05:00:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:46,914 INFO L225 Difference]: With dead ends: 560 [2022-01-18 05:00:46,914 INFO L226 Difference]: Without dead ends: 560 [2022-01-18 05:00:46,914 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 05:00:46,914 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 05:00:46,914 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 05:00:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-18 05:00:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 396. [2022-01-18 05:00:46,918 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 05:00:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 05:00:46,919 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 05:00:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 05:00:46,919 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 05:00:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 05:00:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:46,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:46,920 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:46,939 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 05:00:47,132 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 05:00:47,133 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash 456198578, now seen corresponding path program 158 times [2022-01-18 05:00:47,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:47,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176716548] [2022-01-18 05:00:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:47,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:47,227 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 05:00:47,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176716548] [2022-01-18 05:00:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176716548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599841497] [2022-01-18 05:00:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:47,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:47,229 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 05:00:47,229 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 05:00:47,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:47,479 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 57 treesize of output 45 [2022-01-18 05:00:47,559 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 05:00:47,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:47,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:47,683 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 27 treesize of output 27 [2022-01-18 05:00:47,733 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 05:00:47,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599841497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:47,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:47,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:47,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385755358] [2022-01-18 05:00:47,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:47,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:47,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:47,733 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 05:00:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:48,008 INFO L93 Difference]: Finished difference Result 552 states and 1600 transitions. [2022-01-18 05:00:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:48,008 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 05:00:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:48,009 INFO L225 Difference]: With dead ends: 552 [2022-01-18 05:00:48,009 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 05:00:48,009 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 05:00:48,009 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 05:00:48,009 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 05:00:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 05:00:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 400. [2022-01-18 05:00:48,013 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 05:00:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1244 transitions. [2022-01-18 05:00:48,014 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1244 transitions. Word has length 20 [2022-01-18 05:00:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:48,014 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1244 transitions. [2022-01-18 05:00:48,014 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 05:00:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1244 transitions. [2022-01-18 05:00:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:48,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:48,015 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:48,031 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 05:00:48,215 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 05:00:48,215 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 480098492, now seen corresponding path program 159 times [2022-01-18 05:00:48,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880197395] [2022-01-18 05:00:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:48,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:48,317 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 05:00:48,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880197395] [2022-01-18 05:00:48,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880197395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995049655] [2022-01-18 05:00:48,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:48,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:48,318 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 05:00:48,319 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 05:00:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:48,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:48,559 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 57 treesize of output 45 [2022-01-18 05:00:48,637 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 05:00:48,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:48,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:48,780 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 05:00:48,836 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 05:00:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995049655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:48,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:48,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016469845] [2022-01-18 05:00:48,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:48,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:48,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:48,837 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 05:00:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:49,141 INFO L93 Difference]: Finished difference Result 535 states and 1582 transitions. [2022-01-18 05:00:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:49,142 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 05:00:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:49,143 INFO L225 Difference]: With dead ends: 535 [2022-01-18 05:00:49,143 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 05:00:49,143 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 05:00:49,143 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 05:00:49,143 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 05:00:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 05:00:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 397. [2022-01-18 05:00:49,148 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 05:00:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1234 transitions. [2022-01-18 05:00:49,148 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1234 transitions. Word has length 20 [2022-01-18 05:00:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:49,148 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1234 transitions. [2022-01-18 05:00:49,149 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 05:00:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1234 transitions. [2022-01-18 05:00:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:49,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:49,149 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 05:00:49,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 05:00:49,349 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 05:00:49,350 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1508879944, now seen corresponding path program 160 times [2022-01-18 05:00:49,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:49,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782048064] [2022-01-18 05:00:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:49,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:49,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782048064] [2022-01-18 05:00:49,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782048064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760502476] [2022-01-18 05:00:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:49,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:49,446 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 05:00:49,447 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 05:00:49,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:49,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:49,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:49,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:49,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:50,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760502476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:50,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:50,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:50,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766282664] [2022-01-18 05:00:50,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:50,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:50,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:50,009 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 05:00:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:50,240 INFO L93 Difference]: Finished difference Result 488 states and 1466 transitions. [2022-01-18 05:00:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:50,240 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 05:00:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:50,241 INFO L225 Difference]: With dead ends: 488 [2022-01-18 05:00:50,241 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 05:00:50,241 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 05:00:50,241 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 05:00:50,241 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 05:00:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 05:00:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 398. [2022-01-18 05:00:50,245 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 05:00:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1236 transitions. [2022-01-18 05:00:50,246 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1236 transitions. Word has length 20 [2022-01-18 05:00:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:50,246 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1236 transitions. [2022-01-18 05:00:50,246 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 05:00:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1236 transitions. [2022-01-18 05:00:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:50,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:50,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:50,263 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 05:00:50,447 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 05:00:50,447 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1791711732, now seen corresponding path program 161 times [2022-01-18 05:00:50,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:50,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548682468] [2022-01-18 05:00:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:50,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:50,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548682468] [2022-01-18 05:00:50,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548682468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344342407] [2022-01-18 05:00:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:50,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:50,542 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 05:00:50,543 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 05:00:50,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:50,811 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 27 treesize of output 21 [2022-01-18 05:00:50,869 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 05:00:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:51,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:51,019 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 27 treesize of output 27 [2022-01-18 05:00:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:51,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344342407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:51,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:51,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:51,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947415931] [2022-01-18 05:00:51,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:51,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:51,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:51,073 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 05:00:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:51,382 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2022-01-18 05:00:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:51,383 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 05:00:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:51,383 INFO L225 Difference]: With dead ends: 509 [2022-01-18 05:00:51,383 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 05:00:51,384 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 05:00:51,384 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 05:00:51,384 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 05:00:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 05:00:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 387. [2022-01-18 05:00:51,388 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 05:00:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1199 transitions. [2022-01-18 05:00:51,388 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1199 transitions. Word has length 20 [2022-01-18 05:00:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:51,388 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1199 transitions. [2022-01-18 05:00:51,388 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 05:00:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1199 transitions. [2022-01-18 05:00:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:51,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:51,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:51,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 05:00:51,589 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 05:00:51,589 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2087138914, now seen corresponding path program 162 times [2022-01-18 05:00:51,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:51,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501817888] [2022-01-18 05:00:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:51,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:51,678 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 05:00:51,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:51,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501817888] [2022-01-18 05:00:51,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501817888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:51,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000400713] [2022-01-18 05:00:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:51,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:51,680 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 05:00:51,680 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 05:00:51,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:00:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:52,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:52,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:52,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000400713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:52,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:52,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:52,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398725266] [2022-01-18 05:00:52,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:52,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:52,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:52,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:52,249 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 05:00:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:52,449 INFO L93 Difference]: Finished difference Result 431 states and 1311 transitions. [2022-01-18 05:00:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:52,450 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 05:00:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:52,450 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:00:52,451 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 05:00:52,451 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 05:00:52,452 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 05:00:52,452 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 05:00:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 05:00:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 384. [2022-01-18 05:00:52,456 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 05:00:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2022-01-18 05:00:52,456 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 20 [2022-01-18 05:00:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:52,457 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2022-01-18 05:00:52,457 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 05:00:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2022-01-18 05:00:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:52,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:52,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:52,473 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 05:00:52,657 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 05:00:52,658 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:52,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1371280066, now seen corresponding path program 163 times [2022-01-18 05:00:52,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:52,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655501335] [2022-01-18 05:00:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:52,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:52,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655501335] [2022-01-18 05:00:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655501335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634667701] [2022-01-18 05:00:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:52,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:52,767 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 05:00:52,768 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 05:00:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:53,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:53,145 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 05:00:53,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:53,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:53,282 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 27 treesize of output 27 [2022-01-18 05:00:53,332 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 05:00:53,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634667701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:53,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:53,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:53,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003195298] [2022-01-18 05:00:53,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:53,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:53,333 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 05:00:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:53,561 INFO L93 Difference]: Finished difference Result 476 states and 1405 transitions. [2022-01-18 05:00:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:53,562 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 05:00:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:53,562 INFO L225 Difference]: With dead ends: 476 [2022-01-18 05:00:53,562 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 05:00:53,563 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 05:00:53,563 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 05:00:53,563 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 05:00:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 05:00:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 398. [2022-01-18 05:00:53,567 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 05:00:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1226 transitions. [2022-01-18 05:00:53,567 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1226 transitions. Word has length 20 [2022-01-18 05:00:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:53,567 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1226 transitions. [2022-01-18 05:00:53,567 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 05:00:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1226 transitions. [2022-01-18 05:00:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:53,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:53,568 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 05:00:53,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:53,768 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 05:00:53,769 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1395179980, now seen corresponding path program 164 times [2022-01-18 05:00:53,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:53,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785660030] [2022-01-18 05:00:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:53,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:53,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785660030] [2022-01-18 05:00:53,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785660030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956390989] [2022-01-18 05:00:53,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:53,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:53,874 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 05:00:53,875 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 05:00:53,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:53,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:54,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:54,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:54,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:54,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:00:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956390989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:54,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461372533] [2022-01-18 05:00:54,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:54,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:54,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:54,401 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 05:00:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:54,675 INFO L93 Difference]: Finished difference Result 482 states and 1426 transitions. [2022-01-18 05:00:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:00:54,675 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 05:00:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:54,676 INFO L225 Difference]: With dead ends: 482 [2022-01-18 05:00:54,676 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 05:00:54,676 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 05:00:54,676 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 05:00:54,676 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 05:00:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 05:00:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 396. [2022-01-18 05:00:54,680 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 05:00:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1221 transitions. [2022-01-18 05:00:54,681 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1221 transitions. Word has length 20 [2022-01-18 05:00:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:54,681 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1221 transitions. [2022-01-18 05:00:54,681 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 05:00:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1221 transitions. [2022-01-18 05:00:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:54,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:54,682 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 05:00:54,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:54,882 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 05:00:54,882 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1416652378, now seen corresponding path program 165 times [2022-01-18 05:00:54,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628664129] [2022-01-18 05:00:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:54,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:54,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628664129] [2022-01-18 05:00:54,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628664129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25107297] [2022-01-18 05:00:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:00:54,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:54,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:54,975 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 05:00:54,976 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 05:00:55,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:00:55,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:55,273 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 05:00:55,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:55,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:55,403 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 27 treesize of output 27 [2022-01-18 05:00:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:55,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25107297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:55,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:00:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919375604] [2022-01-18 05:00:55,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:55,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:00:55,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:55,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:00:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:00:55,456 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 05:00:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:55,661 INFO L93 Difference]: Finished difference Result 451 states and 1361 transitions. [2022-01-18 05:00:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:55,662 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 05:00:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:55,662 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:00:55,662 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 05:00:55,663 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 05:00:55,663 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 05:00:55,663 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 05:00:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 05:00:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 383. [2022-01-18 05:00:55,666 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 05:00:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1183 transitions. [2022-01-18 05:00:55,667 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1183 transitions. Word has length 20 [2022-01-18 05:00:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1183 transitions. [2022-01-18 05:00:55,667 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 05:00:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1183 transitions. [2022-01-18 05:00:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:55,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:55,668 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:55,684 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 05:00:55,868 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 05:00:55,868 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 837061820, now seen corresponding path program 166 times [2022-01-18 05:00:55,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:55,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402707610] [2022-01-18 05:00:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:55,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:55,940 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 05:00:55,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402707610] [2022-01-18 05:00:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402707610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831645074] [2022-01-18 05:00:55,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:00:55,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:55,942 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 05:00:55,942 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 05:00:56,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:00:56,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:56,170 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 54 treesize of output 42 [2022-01-18 05:00:56,198 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 05:00:56,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:56,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:56,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:56,378 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 05:00:56,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831645074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:56,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:56,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:00:56,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393593933] [2022-01-18 05:00:56,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:56,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:00:56,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:56,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:00:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:00:56,380 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 05:00:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:56,601 INFO L93 Difference]: Finished difference Result 421 states and 1272 transitions. [2022-01-18 05:00:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:56,602 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 05:00:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:56,602 INFO L225 Difference]: With dead ends: 421 [2022-01-18 05:00:56,602 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 05:00:56,602 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 05:00:56,603 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 05:00:56,603 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 05:00:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 05:00:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 387. [2022-01-18 05:00:56,606 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 05:00:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1193 transitions. [2022-01-18 05:00:56,607 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1193 transitions. Word has length 20 [2022-01-18 05:00:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:56,607 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1193 transitions. [2022-01-18 05:00:56,607 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 05:00:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1193 transitions. [2022-01-18 05:00:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:56,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:56,608 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 05:00:56,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 05:00:56,808 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 05:00:56,809 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1577959154, now seen corresponding path program 167 times [2022-01-18 05:00:56,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:56,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677326818] [2022-01-18 05:00:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:56,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:56,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:56,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677326818] [2022-01-18 05:00:56,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677326818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:56,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990371091] [2022-01-18 05:00:56,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:00:56,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:56,895 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 05:00:56,895 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 05:00:57,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:57,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:57,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:00:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:57,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:57,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:57,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:00:57,370 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 05:00:57,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990371091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:57,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:57,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:00:57,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766609457] [2022-01-18 05:00:57,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:57,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:00:57,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:00:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:00:57,371 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 05:00:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:57,683 INFO L93 Difference]: Finished difference Result 446 states and 1324 transitions. [2022-01-18 05:00:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:00:57,683 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 05:00:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:57,684 INFO L225 Difference]: With dead ends: 446 [2022-01-18 05:00:57,684 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 05:00:57,684 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 05:00:57,684 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 05:00:57,684 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 05:00:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 05:00:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 397. [2022-01-18 05:00:57,688 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 05:00:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1220 transitions. [2022-01-18 05:00:57,689 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1220 transitions. Word has length 20 [2022-01-18 05:00:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1220 transitions. [2022-01-18 05:00:57,689 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 05:00:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1220 transitions. [2022-01-18 05:00:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:57,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:57,689 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:57,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 05:00:57,890 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 05:00:57,890 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1601859068, now seen corresponding path program 168 times [2022-01-18 05:00:57,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:57,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691086960] [2022-01-18 05:00:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:57,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:57,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691086960] [2022-01-18 05:00:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691086960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:57,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636124984] [2022-01-18 05:00:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:00:57,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:57,974 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 05:00:57,974 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 05:00:58,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:00:58,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:58,209 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 75 treesize of output 59 [2022-01-18 05:00:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:58,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:58,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:58,358 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 05:00:58,489 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 05:00:58,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636124984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:58,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:58,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:00:58,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161043132] [2022-01-18 05:00:58,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:58,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:00:58,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:00:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:00:58,490 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 05:00:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:58,714 INFO L93 Difference]: Finished difference Result 417 states and 1270 transitions. [2022-01-18 05:00:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:58,715 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 05:00:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:58,715 INFO L225 Difference]: With dead ends: 417 [2022-01-18 05:00:58,715 INFO L226 Difference]: Without dead ends: 417 [2022-01-18 05:00:58,716 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 05:00:58,716 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 05:00:58,716 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 05:00:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-18 05:00:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 385. [2022-01-18 05:00:58,719 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 05:00:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1188 transitions. [2022-01-18 05:00:58,720 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1188 transitions. Word has length 20 [2022-01-18 05:00:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:58,720 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1188 transitions. [2022-01-18 05:00:58,720 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 05:00:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1188 transitions. [2022-01-18 05:00:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:58,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:58,720 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:00:58,736 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 05:00:58,921 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 05:00:58,921 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash 310501976, now seen corresponding path program 169 times [2022-01-18 05:00:58,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:58,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239301365] [2022-01-18 05:00:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:58,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239301365] [2022-01-18 05:00:58,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239301365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875687220] [2022-01-18 05:00:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:00:58,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:58,984 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 05:00:58,984 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 05:00:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:00:59,169 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 54 treesize of output 42 [2022-01-18 05:00:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:00:59,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:00:59,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:00:59,301 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 27 treesize of output 27 [2022-01-18 05:00:59,358 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 05:00:59,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875687220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:00:59,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:00:59,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:00:59,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402456010] [2022-01-18 05:00:59,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:00:59,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:00:59,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:00:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:00:59,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:00:59,359 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 05:00:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:00:59,544 INFO L93 Difference]: Finished difference Result 452 states and 1339 transitions. [2022-01-18 05:00:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:00:59,544 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 05:00:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:00:59,545 INFO L225 Difference]: With dead ends: 452 [2022-01-18 05:00:59,545 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 05:00:59,545 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 05:00:59,545 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 05:00:59,545 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 05:00:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 05:00:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 399. [2022-01-18 05:00:59,549 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 05:00:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1227 transitions. [2022-01-18 05:00:59,549 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1227 transitions. Word has length 20 [2022-01-18 05:00:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:00:59,549 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1227 transitions. [2022-01-18 05:00:59,549 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 05:00:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1227 transitions. [2022-01-18 05:00:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:00:59,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:00:59,550 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 05:00:59,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 05:00:59,750 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 05:00:59,750 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:00:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:00:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 334401890, now seen corresponding path program 170 times [2022-01-18 05:00:59,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:00:59,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628635505] [2022-01-18 05:00:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:00:59,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:00:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:00:59,814 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 05:00:59,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:00:59,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628635505] [2022-01-18 05:00:59,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628635505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:00:59,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749588447] [2022-01-18 05:00:59,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:00:59,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:00:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:00:59,816 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 05:00:59,816 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 05:00:59,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:00:59,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:00:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:00:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:00,004 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 54 treesize of output 42 [2022-01-18 05:01:00,045 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 05:01:00,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:00,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:00,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:01:00,201 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 05:01:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749588447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:00,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:01:00,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920439042] [2022-01-18 05:01:00,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:00,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:01:00,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:01:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:01:00,202 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 05:01:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:00,367 INFO L93 Difference]: Finished difference Result 452 states and 1345 transitions. [2022-01-18 05:01:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:00,368 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 05:01:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:00,368 INFO L225 Difference]: With dead ends: 452 [2022-01-18 05:01:00,368 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:01:00,369 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 05:01:00,369 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 05:01:00,369 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 05:01:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:01:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 397. [2022-01-18 05:01:00,373 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 05:01:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1222 transitions. [2022-01-18 05:01:00,373 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1222 transitions. Word has length 20 [2022-01-18 05:01:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:00,373 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1222 transitions. [2022-01-18 05:01:00,373 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 05:01:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1222 transitions. [2022-01-18 05:01:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:00,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:00,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:00,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 05:01:00,579 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 05:01:00,579 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1817536828, now seen corresponding path program 171 times [2022-01-18 05:01:00,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:00,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997499805] [2022-01-18 05:01:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:00,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:00,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997499805] [2022-01-18 05:01:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997499805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818395214] [2022-01-18 05:01:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:00,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:00,643 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 05:01:00,643 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 05:01:00,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:01:00,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:00,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:00,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:00,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:00,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:00,935 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 27 treesize of output 27 [2022-01-18 05:01:00,994 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 05:01:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818395214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:00,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:00,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:01:00,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984573704] [2022-01-18 05:01:00,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:00,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:01:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:01:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:01:00,995 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 05:01:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:01,148 INFO L93 Difference]: Finished difference Result 427 states and 1295 transitions. [2022-01-18 05:01:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:01,148 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 05:01:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:01,149 INFO L225 Difference]: With dead ends: 427 [2022-01-18 05:01:01,149 INFO L226 Difference]: Without dead ends: 427 [2022-01-18 05:01:01,149 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 05:01:01,149 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 05:01:01,149 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 05:01:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-18 05:01:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 385. [2022-01-18 05:01:01,153 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 05:01:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1188 transitions. [2022-01-18 05:01:01,153 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1188 transitions. Word has length 20 [2022-01-18 05:01:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1188 transitions. [2022-01-18 05:01:01,154 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 05:01:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1188 transitions. [2022-01-18 05:01:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:01,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:01,154 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:01,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 05:01:01,354 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 05:01:01,355 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash -76078556, now seen corresponding path program 172 times [2022-01-18 05:01:01,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:01,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753013712] [2022-01-18 05:01:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:01,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:01,443 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 05:01:01,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753013712] [2022-01-18 05:01:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753013712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769230817] [2022-01-18 05:01:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:01,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:01,445 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 05:01:01,445 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 05:01:01,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:01,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:01,773 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 65 treesize of output 51 [2022-01-18 05:01:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:01,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:01,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:01,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:02,067 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 05:01:02,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769230817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:02,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:02,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:02,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55780560] [2022-01-18 05:01:02,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:02,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:02,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:02,068 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 05:01:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:02,562 INFO L93 Difference]: Finished difference Result 611 states and 1826 transitions. [2022-01-18 05:01:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:02,562 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 05:01:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:02,563 INFO L225 Difference]: With dead ends: 611 [2022-01-18 05:01:02,563 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 05:01:02,564 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 05:01:02,564 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 05:01:02,564 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 05:01:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 05:01:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 396. [2022-01-18 05:01:02,568 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 05:01:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1230 transitions. [2022-01-18 05:01:02,569 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1230 transitions. Word has length 20 [2022-01-18 05:01:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:02,569 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1230 transitions. [2022-01-18 05:01:02,569 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 05:01:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1230 transitions. [2022-01-18 05:01:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:02,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:02,569 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 05:01:02,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:02,775 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 05:01:02,775 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash 805998878, now seen corresponding path program 173 times [2022-01-18 05:01:02,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900218169] [2022-01-18 05:01:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:02,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:02,865 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 05:01:02,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:02,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900218169] [2022-01-18 05:01:02,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900218169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:02,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156351139] [2022-01-18 05:01:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:02,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:02,867 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 05:01:02,867 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 05:01:02,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:03,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:03,250 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 05:01:03,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:03,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:03,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:03,458 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 05:01:03,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156351139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:03,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:03,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:03,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754020026] [2022-01-18 05:01:03,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:03,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:03,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:03,459 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 05:01:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:04,170 INFO L93 Difference]: Finished difference Result 617 states and 1833 transitions. [2022-01-18 05:01:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:04,170 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 05:01:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:04,171 INFO L225 Difference]: With dead ends: 617 [2022-01-18 05:01:04,171 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 05:01:04,171 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 05:01:04,171 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 05:01:04,171 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 05:01:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 05:01:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 393. [2022-01-18 05:01:04,176 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 05:01:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1219 transitions. [2022-01-18 05:01:04,177 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1219 transitions. Word has length 20 [2022-01-18 05:01:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1219 transitions. [2022-01-18 05:01:04,177 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 05:01:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1219 transitions. [2022-01-18 05:01:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:04,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:04,177 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:04,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:04,395 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 05:01:04,395 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 270769076, now seen corresponding path program 174 times [2022-01-18 05:01:04,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354490176] [2022-01-18 05:01:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:04,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:04,475 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 05:01:04,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:04,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354490176] [2022-01-18 05:01:04,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354490176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:04,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276200506] [2022-01-18 05:01:04,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:04,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:04,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:04,476 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 05:01:04,477 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 05:01:04,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:01:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:04,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:04,853 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 05:01:04,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:04,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:04,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 05:01:05,046 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 05:01:05,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276200506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:05,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:05,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:05,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680269831] [2022-01-18 05:01:05,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:05,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:05,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:05,047 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 05:01:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:05,498 INFO L93 Difference]: Finished difference Result 581 states and 1751 transitions. [2022-01-18 05:01:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:05,499 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 05:01:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:05,499 INFO L225 Difference]: With dead ends: 581 [2022-01-18 05:01:05,500 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 05:01:05,500 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 05:01:05,500 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 05:01:05,500 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 05:01:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 05:01:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 390. [2022-01-18 05:01:05,504 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 05:01:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2022-01-18 05:01:05,505 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 20 [2022-01-18 05:01:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:05,505 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2022-01-18 05:01:05,505 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 05:01:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2022-01-18 05:01:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:05,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:05,505 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:05,706 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 05:01:05,706 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -741923456, now seen corresponding path program 175 times [2022-01-18 05:01:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341817016] [2022-01-18 05:01:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:05,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341817016] [2022-01-18 05:01:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341817016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143826491] [2022-01-18 05:01:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:05,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:05,784 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 05:01:05,785 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 05:01:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:06,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:06,125 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 05:01:06,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:06,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:06,232 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 05:01:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143826491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:06,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:06,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:01:06,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141529282] [2022-01-18 05:01:06,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:06,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:01:06,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:01:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:01:06,309 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 05:01:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:06,729 INFO L93 Difference]: Finished difference Result 613 states and 1811 transitions. [2022-01-18 05:01:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:06,729 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 05:01:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:06,730 INFO L225 Difference]: With dead ends: 613 [2022-01-18 05:01:06,730 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 05:01:06,730 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 05:01:06,730 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 05:01:06,730 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 05:01:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 05:01:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 387. [2022-01-18 05:01:06,735 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 05:01:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1197 transitions. [2022-01-18 05:01:06,735 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1197 transitions. Word has length 20 [2022-01-18 05:01:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:06,735 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1197 transitions. [2022-01-18 05:01:06,735 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 05:01:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1197 transitions. [2022-01-18 05:01:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:06,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:06,736 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 05:01:06,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:06,939 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 05:01:06,939 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1965262844, now seen corresponding path program 176 times [2022-01-18 05:01:06,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184468171] [2022-01-18 05:01:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:06,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:07,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:07,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184468171] [2022-01-18 05:01:07,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184468171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:07,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187584746] [2022-01-18 05:01:07,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:07,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:07,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:07,085 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 05:01:07,086 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 05:01:07,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:01:07,705 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-01-18 05:01:07,778 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 05:01:07,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:07,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:07,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:08,036 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 05:01:08,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187584746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:08,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:08,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:08,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079629821] [2022-01-18 05:01:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:08,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:08,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:08,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:08,037 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 05:01:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:08,336 INFO L93 Difference]: Finished difference Result 538 states and 1643 transitions. [2022-01-18 05:01:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:08,336 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 05:01:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:08,337 INFO L225 Difference]: With dead ends: 538 [2022-01-18 05:01:08,337 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 05:01:08,337 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 05:01:08,337 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 05:01:08,338 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 05:01:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 05:01:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 394. [2022-01-18 05:01:08,342 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 05:01:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1224 transitions. [2022-01-18 05:01:08,342 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1224 transitions. Word has length 20 [2022-01-18 05:01:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:08,343 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1224 transitions. [2022-01-18 05:01:08,343 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 05:01:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1224 transitions. [2022-01-18 05:01:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:08,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:08,343 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:08,359 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 05:01:08,544 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 05:01:08,544 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1447627018, now seen corresponding path program 177 times [2022-01-18 05:01:08,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:08,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072759499] [2022-01-18 05:01:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:08,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:08,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072759499] [2022-01-18 05:01:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072759499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515013662] [2022-01-18 05:01:08,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:08,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:08,642 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 05:01:08,642 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 05:01:08,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:09,004 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 65 treesize of output 51 [2022-01-18 05:01:09,064 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 05:01:09,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:09,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:09,199 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 49 treesize of output 45 [2022-01-18 05:01:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:09,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515013662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:09,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:09,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:09,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620515305] [2022-01-18 05:01:09,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:09,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:09,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:09,280 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 05:01:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:09,903 INFO L93 Difference]: Finished difference Result 629 states and 1863 transitions. [2022-01-18 05:01:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:09,903 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 05:01:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:09,904 INFO L225 Difference]: With dead ends: 629 [2022-01-18 05:01:09,904 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 05:01:09,904 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 05:01:09,904 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 05:01:09,904 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 05:01:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 05:01:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 391. [2022-01-18 05:01:09,909 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 05:01:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1213 transitions. [2022-01-18 05:01:09,909 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1213 transitions. Word has length 20 [2022-01-18 05:01:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:09,909 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1213 transitions. [2022-01-18 05:01:09,909 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 05:01:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1213 transitions. [2022-01-18 05:01:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:09,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:09,910 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:09,926 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 05:01:10,110 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 05:01:10,111 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1982856820, now seen corresponding path program 178 times [2022-01-18 05:01:10,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:10,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721483741] [2022-01-18 05:01:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:10,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:10,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721483741] [2022-01-18 05:01:10,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721483741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782411809] [2022-01-18 05:01:10,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:10,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:10,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:10,203 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 05:01:10,204 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 05:01:10,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:10,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:10,571 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 54 treesize of output 42 [2022-01-18 05:01:10,599 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 05:01:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:10,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:10,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:10,807 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 05:01:10,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782411809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:10,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:10,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:10,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881995828] [2022-01-18 05:01:10,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:10,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:10,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:10,808 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 05:01:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:11,245 INFO L93 Difference]: Finished difference Result 593 states and 1781 transitions. [2022-01-18 05:01:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:11,246 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 05:01:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:11,246 INFO L225 Difference]: With dead ends: 593 [2022-01-18 05:01:11,246 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 05:01:11,247 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 05:01:11,247 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 05:01:11,247 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 05:01:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 05:01:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 388. [2022-01-18 05:01:11,251 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 05:01:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 05:01:11,251 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 05:01:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:11,251 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 05:01:11,252 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 05:01:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 05:01:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:11,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:11,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:11,268 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 05:01:11,452 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 05:01:11,453 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -836723578, now seen corresponding path program 179 times [2022-01-18 05:01:11,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:11,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83378454] [2022-01-18 05:01:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:11,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:11,555 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 05:01:11,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83378454] [2022-01-18 05:01:11,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83378454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251698575] [2022-01-18 05:01:11,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:11,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:11,557 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 05:01:11,557 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 05:01:11,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:11,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:11,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:12,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:12,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:12,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:12,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251698575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:12,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:12,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:12,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605128254] [2022-01-18 05:01:12,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:12,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:12,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:12,310 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 05:01:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:13,179 INFO L93 Difference]: Finished difference Result 701 states and 2053 transitions. [2022-01-18 05:01:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:13,180 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 05:01:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:13,181 INFO L225 Difference]: With dead ends: 701 [2022-01-18 05:01:13,181 INFO L226 Difference]: Without dead ends: 701 [2022-01-18 05:01:13,181 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 05:01:13,181 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 05:01:13,181 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 05:01:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-18 05:01:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 396. [2022-01-18 05:01:13,193 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 05:01:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1238 transitions. [2022-01-18 05:01:13,193 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1238 transitions. Word has length 20 [2022-01-18 05:01:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:13,193 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1238 transitions. [2022-01-18 05:01:13,193 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 05:01:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1238 transitions. [2022-01-18 05:01:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:13,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:13,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:13,210 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 05:01:13,394 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 05:01:13,395 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash 45353856, now seen corresponding path program 180 times [2022-01-18 05:01:13,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926967118] [2022-01-18 05:01:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:13,510 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 05:01:13,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926967118] [2022-01-18 05:01:13,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926967118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547290989] [2022-01-18 05:01:13,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:13,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:13,512 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 05:01:13,512 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 05:01:13,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:01:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:13,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:13,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:13,927 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 05:01:13,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:14,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:14,065 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 05:01:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547290989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:14,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:14,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:14,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222606726] [2022-01-18 05:01:14,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:14,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:14,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:14,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:14,144 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 05:01:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:15,028 INFO L93 Difference]: Finished difference Result 730 states and 2099 transitions. [2022-01-18 05:01:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:01:15,028 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 05:01:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:15,029 INFO L225 Difference]: With dead ends: 730 [2022-01-18 05:01:15,029 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 05:01:15,029 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 05:01:15,029 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 05:01:15,029 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 05:01:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 05:01:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 399. [2022-01-18 05:01:15,034 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 05:01:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1240 transitions. [2022-01-18 05:01:15,035 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1240 transitions. Word has length 20 [2022-01-18 05:01:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:15,035 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1240 transitions. [2022-01-18 05:01:15,035 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 05:01:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1240 transitions. [2022-01-18 05:01:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:15,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:15,036 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 05:01:15,052 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 05:01:15,236 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 05:01:15,236 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -95826244, now seen corresponding path program 181 times [2022-01-18 05:01:15,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121393037] [2022-01-18 05:01:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:15,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:15,344 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 05:01:15,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121393037] [2022-01-18 05:01:15,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121393037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104655788] [2022-01-18 05:01:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:15,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:15,346 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 05:01:15,346 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 05:01:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:15,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:15,712 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 106 treesize of output 84 [2022-01-18 05:01:15,882 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 05:01:15,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:16,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:16,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:16,125 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 05:01:16,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104655788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:16,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:16,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:16,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160822493] [2022-01-18 05:01:16,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:16,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:16,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:16,126 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 05:01:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:16,689 INFO L93 Difference]: Finished difference Result 669 states and 1974 transitions. [2022-01-18 05:01:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:16,689 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 05:01:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:16,690 INFO L225 Difference]: With dead ends: 669 [2022-01-18 05:01:16,690 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 05:01:16,690 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 05:01:16,691 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 05:01:16,691 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 05:01:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 05:01:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 392. [2022-01-18 05:01:16,695 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 05:01:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1222 transitions. [2022-01-18 05:01:16,696 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1222 transitions. Word has length 20 [2022-01-18 05:01:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1222 transitions. [2022-01-18 05:01:16,696 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 05:01:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1222 transitions. [2022-01-18 05:01:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:16,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:16,697 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 05:01:16,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:16,897 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 05:01:16,897 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 898549376, now seen corresponding path program 182 times [2022-01-18 05:01:16,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:16,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131186742] [2022-01-18 05:01:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:16,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:17,009 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 05:01:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131186742] [2022-01-18 05:01:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131186742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807333229] [2022-01-18 05:01:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:17,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:17,011 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 05:01:17,011 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 05:01:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:17,365 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 106 treesize of output 84 [2022-01-18 05:01:17,471 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 05:01:17,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:17,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:17,620 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 49 treesize of output 45 [2022-01-18 05:01:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:17,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807333229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:17,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:17,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:17,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778151486] [2022-01-18 05:01:17,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:17,704 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 05:01:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:18,405 INFO L93 Difference]: Finished difference Result 665 states and 1963 transitions. [2022-01-18 05:01:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:18,405 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 05:01:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:18,406 INFO L225 Difference]: With dead ends: 665 [2022-01-18 05:01:18,406 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 05:01:18,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-18 05:01:18,407 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 05:01:18,407 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 05:01:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 05:01:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 389. [2022-01-18 05:01:18,412 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 05:01:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1207 transitions. [2022-01-18 05:01:18,412 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1207 transitions. Word has length 20 [2022-01-18 05:01:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:18,412 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1207 transitions. [2022-01-18 05:01:18,412 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 05:01:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1207 transitions. [2022-01-18 05:01:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:18,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:18,413 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 05:01:18,430 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 05:01:18,630 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 05:01:18,630 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1879002508, now seen corresponding path program 183 times [2022-01-18 05:01:18,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433837603] [2022-01-18 05:01:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:18,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:18,710 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 05:01:18,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433837603] [2022-01-18 05:01:18,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433837603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701991569] [2022-01-18 05:01:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:18,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:18,712 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 05:01:18,712 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 05:01:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:19,093 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 05:01:19,178 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 05:01:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:19,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:19,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701991569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:19,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:19,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:19,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767613187] [2022-01-18 05:01:19,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:19,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:19,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:19,373 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 05:01:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:20,087 INFO L93 Difference]: Finished difference Result 669 states and 1966 transitions. [2022-01-18 05:01:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:01:20,087 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 05:01:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:20,088 INFO L225 Difference]: With dead ends: 669 [2022-01-18 05:01:20,088 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 05:01:20,088 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 05:01:20,088 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 05:01:20,088 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 05:01:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 05:01:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 399. [2022-01-18 05:01:20,095 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 05:01:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1234 transitions. [2022-01-18 05:01:20,096 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1234 transitions. Word has length 20 [2022-01-18 05:01:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:20,096 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1234 transitions. [2022-01-18 05:01:20,096 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 05:01:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1234 transitions. [2022-01-18 05:01:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:20,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:20,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:20,113 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 05:01:20,297 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 05:01:20,297 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1902902422, now seen corresponding path program 184 times [2022-01-18 05:01:20,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:20,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261891767] [2022-01-18 05:01:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:20,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:20,379 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 05:01:20,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:20,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261891767] [2022-01-18 05:01:20,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261891767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:20,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782859179] [2022-01-18 05:01:20,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:20,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:20,381 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 05:01:20,381 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 05:01:20,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:20,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:20,689 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 90 treesize of output 72 [2022-01-18 05:01:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:20,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:20,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:20,939 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 05:01:21,028 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 05:01:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782859179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:21,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:01:21,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933308840] [2022-01-18 05:01:21,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:01:21,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:01:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:01:21,029 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 05:01:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:21,649 INFO L93 Difference]: Finished difference Result 646 states and 1927 transitions. [2022-01-18 05:01:21,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:21,649 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 05:01:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:21,650 INFO L225 Difference]: With dead ends: 646 [2022-01-18 05:01:21,650 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 05:01:21,650 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 05:01:21,650 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 05:01:21,650 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 05:01:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 05:01:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 388. [2022-01-18 05:01:21,655 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 05:01:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 05:01:21,655 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 05:01:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:21,655 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 05:01:21,655 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 05:01:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 05:01:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:21,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:21,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:21,672 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 05:01:21,856 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 05:01:21,856 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -974323456, now seen corresponding path program 185 times [2022-01-18 05:01:21,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:21,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173016038] [2022-01-18 05:01:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:21,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:21,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173016038] [2022-01-18 05:01:21,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173016038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106453873] [2022-01-18 05:01:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:21,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:21,935 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 05:01:21,935 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 05:01:22,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:22,301 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 05:01:22,319 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 05:01:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:22,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:22,422 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 49 treesize of output 45 [2022-01-18 05:01:22,503 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 05:01:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106453873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:22,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:22,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:01:22,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806578719] [2022-01-18 05:01:22,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:22,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:01:22,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:22,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:01:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:01:22,504 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 05:01:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:22,882 INFO L93 Difference]: Finished difference Result 586 states and 1764 transitions. [2022-01-18 05:01:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:22,883 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 05:01:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:22,884 INFO L225 Difference]: With dead ends: 586 [2022-01-18 05:01:22,884 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 05:01:22,884 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 05:01:22,884 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 05:01:22,884 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 05:01:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 05:01:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 390. [2022-01-18 05:01:22,888 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 05:01:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2022-01-18 05:01:22,889 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 20 [2022-01-18 05:01:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2022-01-18 05:01:22,889 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 05:01:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2022-01-18 05:01:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:22,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:22,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:22,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:23,090 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 05:01:23,090 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash -233426122, now seen corresponding path program 186 times [2022-01-18 05:01:23,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:23,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415737301] [2022-01-18 05:01:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:23,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:23,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415737301] [2022-01-18 05:01:23,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415737301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792367552] [2022-01-18 05:01:23,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:23,193 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 05:01:23,193 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 05:01:23,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:01:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:23,535 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 72 treesize of output 56 [2022-01-18 05:01:23,609 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 05:01:23,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:23,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:23,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:23,803 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 05:01:23,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792367552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:23,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:23,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:23,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226011326] [2022-01-18 05:01:23,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:23,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:23,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:23,804 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 05:01:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:24,422 INFO L93 Difference]: Finished difference Result 611 states and 1816 transitions. [2022-01-18 05:01:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:24,422 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 05:01:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:24,423 INFO L225 Difference]: With dead ends: 611 [2022-01-18 05:01:24,423 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 05:01:24,424 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 05:01:24,424 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 05:01:24,424 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 05:01:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 05:01:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 400. [2022-01-18 05:01:24,428 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 05:01:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1234 transitions. [2022-01-18 05:01:24,429 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1234 transitions. Word has length 20 [2022-01-18 05:01:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1234 transitions. [2022-01-18 05:01:24,429 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 05:01:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1234 transitions. [2022-01-18 05:01:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:24,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:24,430 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 05:01:24,446 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 05:01:24,639 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 05:01:24,639 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash -209526208, now seen corresponding path program 187 times [2022-01-18 05:01:24,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:24,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106301396] [2022-01-18 05:01:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:24,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:24,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106301396] [2022-01-18 05:01:24,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106301396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312276935] [2022-01-18 05:01:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:24,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:24,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:24,745 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 05:01:24,745 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 05:01:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:25,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:25,191 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 05:01:25,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:25,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:25,326 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 05:01:25,409 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 05:01:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312276935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:25,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:25,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:25,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793493714] [2022-01-18 05:01:25,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:25,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:25,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:25,410 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 05:01:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:25,859 INFO L93 Difference]: Finished difference Result 582 states and 1762 transitions. [2022-01-18 05:01:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:25,859 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 05:01:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:25,860 INFO L225 Difference]: With dead ends: 582 [2022-01-18 05:01:25,860 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 05:01:25,860 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 05:01:25,860 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 05:01:25,860 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 05:01:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 05:01:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 387. [2022-01-18 05:01:25,864 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 05:01:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1197 transitions. [2022-01-18 05:01:25,865 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1197 transitions. Word has length 20 [2022-01-18 05:01:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:25,865 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1197 transitions. [2022-01-18 05:01:25,865 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 05:01:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1197 transitions. [2022-01-18 05:01:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:25,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:25,866 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:25,882 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 05:01:26,079 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 05:01:26,079 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 457839756, now seen corresponding path program 188 times [2022-01-18 05:01:26,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:26,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636792287] [2022-01-18 05:01:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:26,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:26,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:26,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636792287] [2022-01-18 05:01:26,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636792287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178195770] [2022-01-18 05:01:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:26,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:26,145 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 05:01:26,145 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 05:01:26,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:26,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:26,446 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 54 treesize of output 42 [2022-01-18 05:01:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:26,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:26,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:26,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:26,623 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 05:01:26,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178195770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:26,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:26,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:01:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385632133] [2022-01-18 05:01:26,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:01:26,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:01:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:01:26,624 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 05:01:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:26,979 INFO L93 Difference]: Finished difference Result 676 states and 1969 transitions. [2022-01-18 05:01:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:26,980 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 05:01:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:26,980 INFO L225 Difference]: With dead ends: 676 [2022-01-18 05:01:26,981 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 05:01:26,981 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 05:01:26,981 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 05:01:26,981 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 05:01:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 05:01:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 389. [2022-01-18 05:01:26,985 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 05:01:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1202 transitions. [2022-01-18 05:01:26,986 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1202 transitions. Word has length 20 [2022-01-18 05:01:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:26,986 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1202 transitions. [2022-01-18 05:01:26,986 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 05:01:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1202 transitions. [2022-01-18 05:01:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:26,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:26,987 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 05:01:27,003 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 05:01:27,187 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 05:01:27,187 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2047710132, now seen corresponding path program 189 times [2022-01-18 05:01:27,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794309726] [2022-01-18 05:01:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:27,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:27,275 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 05:01:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794309726] [2022-01-18 05:01:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794309726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847012470] [2022-01-18 05:01:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:27,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:27,276 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 05:01:27,277 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 05:01:27,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:27,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:27,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:27,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:27,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:27,837 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 05:01:27,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847012470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:27,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:27,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:27,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907287792] [2022-01-18 05:01:27,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:27,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:27,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:27,838 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 05:01:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:28,304 INFO L93 Difference]: Finished difference Result 637 states and 1890 transitions. [2022-01-18 05:01:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:28,305 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 05:01:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:28,306 INFO L225 Difference]: With dead ends: 637 [2022-01-18 05:01:28,306 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 05:01:28,306 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 05:01:28,306 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:01:28,306 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 05:01:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 05:01:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 391. [2022-01-18 05:01:28,311 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 05:01:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1207 transitions. [2022-01-18 05:01:28,311 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1207 transitions. Word has length 20 [2022-01-18 05:01:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:28,312 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1207 transitions. [2022-01-18 05:01:28,312 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 05:01:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1207 transitions. [2022-01-18 05:01:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:28,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:28,312 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 05:01:28,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 05:01:28,527 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 05:01:28,527 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1506359830, now seen corresponding path program 190 times [2022-01-18 05:01:28,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286335639] [2022-01-18 05:01:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:28,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:28,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286335639] [2022-01-18 05:01:28,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286335639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974358032] [2022-01-18 05:01:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:28,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:28,600 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 05:01:28,600 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 05:01:28,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:28,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:28,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:28,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:28,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:29,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:29,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:29,164 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 05:01:29,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974358032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:29,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:29,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:29,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406139327] [2022-01-18 05:01:29,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:29,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:29,165 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 05:01:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:29,677 INFO L93 Difference]: Finished difference Result 662 states and 1942 transitions. [2022-01-18 05:01:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:29,677 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 05:01:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:29,678 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:01:29,678 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 05:01:29,679 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 05:01:29,679 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 05:01:29,679 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 05:01:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 05:01:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 401. [2022-01-18 05:01:29,684 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 05:01:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1234 transitions. [2022-01-18 05:01:29,684 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1234 transitions. Word has length 20 [2022-01-18 05:01:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:29,684 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1234 transitions. [2022-01-18 05:01:29,684 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 05:01:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1234 transitions. [2022-01-18 05:01:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:29,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:29,685 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 05:01:29,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:29,887 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 05:01:29,887 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1482459916, now seen corresponding path program 191 times [2022-01-18 05:01:29,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895007347] [2022-01-18 05:01:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:29,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:29,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895007347] [2022-01-18 05:01:29,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895007347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565264062] [2022-01-18 05:01:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:29,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:29,990 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 05:01:29,991 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 05:01:30,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:01:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:30,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:30,393 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 05:01:30,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:30,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:30,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:30,604 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 05:01:30,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565264062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:30,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:30,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:30,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899887952] [2022-01-18 05:01:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:30,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:30,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:30,605 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 05:01:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:31,059 INFO L93 Difference]: Finished difference Result 633 states and 1888 transitions. [2022-01-18 05:01:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:31,059 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 05:01:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:31,060 INFO L225 Difference]: With dead ends: 633 [2022-01-18 05:01:31,060 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 05:01:31,061 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 05:01:31,061 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 05:01:31,061 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 05:01:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 05:01:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 386. [2022-01-18 05:01:31,065 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 05:01:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 05:01:31,066 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 05:01:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:31,066 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 05:01:31,066 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 05:01:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 05:01:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:31,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:31,066 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 05:01:31,083 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 05:01:31,267 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 05:01:31,267 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1696516416, now seen corresponding path program 192 times [2022-01-18 05:01:31,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901133486] [2022-01-18 05:01:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:31,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:31,373 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 05:01:31,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901133486] [2022-01-18 05:01:31,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901133486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022217501] [2022-01-18 05:01:31,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:31,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:31,374 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 05:01:31,375 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 05:01:31,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:01:31,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:31,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:31,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:31,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:31,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:31,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:31,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:32,078 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 05:01:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022217501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:32,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:32,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:32,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336688154] [2022-01-18 05:01:32,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:32,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:32,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:32,079 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 05:01:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:32,505 INFO L93 Difference]: Finished difference Result 494 states and 1475 transitions. [2022-01-18 05:01:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:32,505 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 05:01:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:32,506 INFO L225 Difference]: With dead ends: 494 [2022-01-18 05:01:32,506 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 05:01:32,506 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 05:01:32,506 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 05:01:32,506 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 05:01:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 05:01:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 394. [2022-01-18 05:01:32,510 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 05:01:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1223 transitions. [2022-01-18 05:01:32,511 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1223 transitions. Word has length 20 [2022-01-18 05:01:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:32,511 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1223 transitions. [2022-01-18 05:01:32,511 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 05:01:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1223 transitions. [2022-01-18 05:01:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:32,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:32,512 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:32,527 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 05:01:32,712 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 05:01:32,712 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1716373446, now seen corresponding path program 193 times [2022-01-18 05:01:32,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013053866] [2022-01-18 05:01:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:32,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:32,807 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 05:01:32,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013053866] [2022-01-18 05:01:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013053866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44586806] [2022-01-18 05:01:32,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:32,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:32,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:32,808 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 05:01:32,831 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 05:01:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:32,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:33,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:33,284 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 05:01:33,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:33,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:33,391 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 45 [2022-01-18 05:01:33,514 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 05:01:33,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44586806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:33,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:33,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:33,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421879547] [2022-01-18 05:01:33,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:33,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:33,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:33,515 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 05:01:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:33,992 INFO L93 Difference]: Finished difference Result 500 states and 1482 transitions. [2022-01-18 05:01:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:33,993 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 05:01:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:33,993 INFO L225 Difference]: With dead ends: 500 [2022-01-18 05:01:33,993 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 05:01:33,993 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 05:01:33,994 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 05:01:33,994 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 05:01:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 05:01:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 391. [2022-01-18 05:01:33,997 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 05:01:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1212 transitions. [2022-01-18 05:01:33,998 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1212 transitions. Word has length 20 [2022-01-18 05:01:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:33,998 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1212 transitions. [2022-01-18 05:01:33,998 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 05:01:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1212 transitions. [2022-01-18 05:01:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:33,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:33,999 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:34,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:34,199 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 05:01:34,199 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2043364048, now seen corresponding path program 194 times [2022-01-18 05:01:34,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487157127] [2022-01-18 05:01:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:34,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:34,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487157127] [2022-01-18 05:01:34,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487157127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967488516] [2022-01-18 05:01:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:34,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:34,271 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 05:01:34,272 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 05:01:34,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:34,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:34,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:34,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:34,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:34,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:34,847 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 05:01:34,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967488516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:34,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:34,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:01:34,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169687276] [2022-01-18 05:01:34,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:34,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:01:34,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:01:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:01:34,848 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 05:01:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:35,139 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2022-01-18 05:01:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:35,139 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 05:01:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:35,140 INFO L225 Difference]: With dead ends: 464 [2022-01-18 05:01:35,140 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:01:35,140 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 05:01:35,140 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 05:01:35,140 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 05:01:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:01:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 388. [2022-01-18 05:01:35,144 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 05:01:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1201 transitions. [2022-01-18 05:01:35,145 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1201 transitions. Word has length 20 [2022-01-18 05:01:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:35,145 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1201 transitions. [2022-01-18 05:01:35,145 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 05:01:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1201 transitions. [2022-01-18 05:01:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:35,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:35,145 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:35,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:35,362 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 05:01:35,362 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1105470006, now seen corresponding path program 195 times [2022-01-18 05:01:35,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064743370] [2022-01-18 05:01:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:35,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:35,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064743370] [2022-01-18 05:01:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064743370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926630214] [2022-01-18 05:01:35,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:35,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:35,469 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 05:01:35,470 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 05:01:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:35,821 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 86 treesize of output 68 [2022-01-18 05:01:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:35,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:36,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:36,105 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 45 [2022-01-18 05:01:36,235 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 05:01:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926630214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:36,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:36,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:36,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914073596] [2022-01-18 05:01:36,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:36,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:36,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:36,236 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 05:01:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:36,752 INFO L93 Difference]: Finished difference Result 581 states and 1693 transitions. [2022-01-18 05:01:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:36,752 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 05:01:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:36,753 INFO L225 Difference]: With dead ends: 581 [2022-01-18 05:01:36,753 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 05:01:36,753 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 05:01:36,753 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 05:01:36,753 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 05:01:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 05:01:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 396. [2022-01-18 05:01:36,767 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 05:01:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1237 transitions. [2022-01-18 05:01:36,768 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1237 transitions. Word has length 20 [2022-01-18 05:01:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:36,768 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1237 transitions. [2022-01-18 05:01:36,768 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 05:01:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1237 transitions. [2022-01-18 05:01:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:36,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:36,768 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 05:01:36,784 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 05:01:36,969 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 05:01:36,969 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:36,970 INFO L85 PathProgramCache]: Analyzing trace with hash -223392572, now seen corresponding path program 196 times [2022-01-18 05:01:36,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:36,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408860186] [2022-01-18 05:01:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:36,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:37,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:37,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408860186] [2022-01-18 05:01:37,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408860186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:37,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238296586] [2022-01-18 05:01:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:37,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:37,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:37,066 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 05:01:37,067 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 05:01:37,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:37,356 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 90 treesize of output 72 [2022-01-18 05:01:37,446 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 05:01:37,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:37,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:37,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:37,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238296586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:37,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:37,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:37,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566883308] [2022-01-18 05:01:37,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:37,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:37,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:37,667 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 05:01:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:38,253 INFO L93 Difference]: Finished difference Result 610 states and 1739 transitions. [2022-01-18 05:01:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:01:38,253 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 05:01:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:38,254 INFO L225 Difference]: With dead ends: 610 [2022-01-18 05:01:38,254 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 05:01:38,254 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 05:01:38,254 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 05:01:38,254 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 05:01:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 05:01:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 399. [2022-01-18 05:01:38,258 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 05:01:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1239 transitions. [2022-01-18 05:01:38,259 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1239 transitions. Word has length 20 [2022-01-18 05:01:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:38,259 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1239 transitions. [2022-01-18 05:01:38,259 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 05:01:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1239 transitions. [2022-01-18 05:01:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:38,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:38,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:38,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 05:01:38,460 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 05:01:38,460 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:38,461 INFO L85 PathProgramCache]: Analyzing trace with hash -364572672, now seen corresponding path program 197 times [2022-01-18 05:01:38,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:38,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219601052] [2022-01-18 05:01:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:38,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:38,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219601052] [2022-01-18 05:01:38,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219601052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311749313] [2022-01-18 05:01:38,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:38,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:38,567 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 05:01:38,567 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 05:01:38,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:01:38,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:38,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:39,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:39,140 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 05:01:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:39,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311749313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:39,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:39,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:39,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701105509] [2022-01-18 05:01:39,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:39,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:39,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:39,277 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 05:01:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:39,741 INFO L93 Difference]: Finished difference Result 549 states and 1614 transitions. [2022-01-18 05:01:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:39,742 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 05:01:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:39,742 INFO L225 Difference]: With dead ends: 549 [2022-01-18 05:01:39,742 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 05:01:39,743 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 05:01:39,743 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 05:01:39,743 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 05:01:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 05:01:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 392. [2022-01-18 05:01:39,747 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 05:01:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1221 transitions. [2022-01-18 05:01:39,747 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1221 transitions. Word has length 20 [2022-01-18 05:01:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1221 transitions. [2022-01-18 05:01:39,748 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 05:01:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1221 transitions. [2022-01-18 05:01:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:39,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:39,748 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 05:01:39,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:39,948 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 05:01:39,949 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash 629802948, now seen corresponding path program 198 times [2022-01-18 05:01:39,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:39,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132270405] [2022-01-18 05:01:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:39,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132270405] [2022-01-18 05:01:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132270405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792344892] [2022-01-18 05:01:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:40,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:40,030 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 05:01:40,030 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 05:01:40,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:01:40,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:40,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:40,365 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 106 treesize of output 84 [2022-01-18 05:01:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:40,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:40,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:40,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:40,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792344892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:40,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:40,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:01:40,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416943966] [2022-01-18 05:01:40,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:40,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:01:40,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:01:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:01:40,723 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 05:01:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:41,108 INFO L93 Difference]: Finished difference Result 578 states and 1674 transitions. [2022-01-18 05:01:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:41,108 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 05:01:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:41,109 INFO L225 Difference]: With dead ends: 578 [2022-01-18 05:01:41,109 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 05:01:41,109 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 05:01:41,110 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 05:01:41,110 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 05:01:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 05:01:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 389. [2022-01-18 05:01:41,114 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 05:01:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1206 transitions. [2022-01-18 05:01:41,114 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1206 transitions. Word has length 20 [2022-01-18 05:01:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:41,114 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1206 transitions. [2022-01-18 05:01:41,114 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 05:01:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1206 transitions. [2022-01-18 05:01:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:41,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:41,115 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 05:01:41,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:41,315 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 05:01:41,316 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1610256080, now seen corresponding path program 199 times [2022-01-18 05:01:41,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:41,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511426963] [2022-01-18 05:01:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:41,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:41,415 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 05:01:41,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:41,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511426963] [2022-01-18 05:01:41,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511426963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:41,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774638707] [2022-01-18 05:01:41,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:41,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:41,416 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 05:01:41,417 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 05:01:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:41,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:41,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:42,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:42,058 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 05:01:42,174 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 05:01:42,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774638707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:42,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:42,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:42,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449823640] [2022-01-18 05:01:42,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:42,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:42,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:42,175 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 05:01:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:42,684 INFO L93 Difference]: Finished difference Result 549 states and 1606 transitions. [2022-01-18 05:01:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:01:42,685 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 05:01:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:42,686 INFO L225 Difference]: With dead ends: 549 [2022-01-18 05:01:42,686 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 05:01:42,686 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 05:01:42,686 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 05:01:42,686 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 05:01:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 05:01:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 399. [2022-01-18 05:01:42,690 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 05:01:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1233 transitions. [2022-01-18 05:01:42,691 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1233 transitions. Word has length 20 [2022-01-18 05:01:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:42,691 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1233 transitions. [2022-01-18 05:01:42,691 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 05:01:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1233 transitions. [2022-01-18 05:01:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:42,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:42,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:42,708 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 05:01:42,892 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 05:01:42,892 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1634155994, now seen corresponding path program 200 times [2022-01-18 05:01:42,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:42,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211497943] [2022-01-18 05:01:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:42,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:42,996 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 05:01:42,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211497943] [2022-01-18 05:01:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211497943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905337302] [2022-01-18 05:01:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:42,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:42,998 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 05:01:42,998 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 05:01:43,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:43,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:43,326 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 106 treesize of output 84 [2022-01-18 05:01:43,451 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 05:01:43,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:43,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:43,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905337302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:43,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:43,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:43,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134135243] [2022-01-18 05:01:43,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:43,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:43,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:43,678 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 05:01:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:44,158 INFO L93 Difference]: Finished difference Result 526 states and 1567 transitions. [2022-01-18 05:01:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:44,159 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 05:01:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:44,160 INFO L225 Difference]: With dead ends: 526 [2022-01-18 05:01:44,160 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 05:01:44,160 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 05:01:44,160 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 05:01:44,160 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 05:01:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 05:01:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 388. [2022-01-18 05:01:44,164 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 05:01:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1201 transitions. [2022-01-18 05:01:44,165 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1201 transitions. Word has length 20 [2022-01-18 05:01:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:44,165 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1201 transitions. [2022-01-18 05:01:44,165 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 05:01:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1201 transitions. [2022-01-18 05:01:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:44,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:44,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:44,181 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 05:01:44,366 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 05:01:44,366 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1243069884, now seen corresponding path program 201 times [2022-01-18 05:01:44,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:44,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329850966] [2022-01-18 05:01:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:44,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:44,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329850966] [2022-01-18 05:01:44,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329850966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740809605] [2022-01-18 05:01:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:44,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:44,454 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 05:01:44,455 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 05:01:44,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:44,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:44,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:44,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:44,842 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 05:01:44,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:44,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:44,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:01:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:45,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740809605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:45,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:45,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:01:45,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726313082] [2022-01-18 05:01:45,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:45,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:01:45,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:01:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:01:45,064 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 05:01:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:45,425 INFO L93 Difference]: Finished difference Result 466 states and 1404 transitions. [2022-01-18 05:01:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:45,426 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 05:01:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:45,427 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:01:45,427 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 05:01:45,427 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 05:01:45,427 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 05:01:45,427 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 05:01:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 05:01:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 390. [2022-01-18 05:01:45,431 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 05:01:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2022-01-18 05:01:45,440 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 20 [2022-01-18 05:01:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:45,441 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2022-01-18 05:01:45,441 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 05:01:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2022-01-18 05:01:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:45,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:45,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:45,458 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 05:01:45,641 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 05:01:45,642 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash -502172550, now seen corresponding path program 202 times [2022-01-18 05:01:45,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:45,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863404511] [2022-01-18 05:01:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:45,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:45,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863404511] [2022-01-18 05:01:45,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863404511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:45,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769162904] [2022-01-18 05:01:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:45,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:45,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:45,717 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 05:01:45,717 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 05:01:45,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:45,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:46,044 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 72 treesize of output 56 [2022-01-18 05:01:46,112 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 05:01:46,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:46,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:46,198 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 05:01:46,313 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 05:01:46,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769162904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:46,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:46,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:46,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969811357] [2022-01-18 05:01:46,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:46,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:46,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:46,314 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 05:01:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:46,628 INFO L93 Difference]: Finished difference Result 491 states and 1456 transitions. [2022-01-18 05:01:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:46,628 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 05:01:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:46,629 INFO L225 Difference]: With dead ends: 491 [2022-01-18 05:01:46,629 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 05:01:46,629 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 05:01:46,629 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 05:01:46,629 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 05:01:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 05:01:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 400. [2022-01-18 05:01:46,633 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 05:01:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1233 transitions. [2022-01-18 05:01:46,634 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1233 transitions. Word has length 20 [2022-01-18 05:01:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:46,634 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1233 transitions. [2022-01-18 05:01:46,634 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 05:01:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1233 transitions. [2022-01-18 05:01:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:46,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:46,634 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 05:01:46,659 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 05:01:46,851 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 05:01:46,851 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -478272636, now seen corresponding path program 203 times [2022-01-18 05:01:46,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:46,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029564423] [2022-01-18 05:01:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:46,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:46,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029564423] [2022-01-18 05:01:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029564423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746805077] [2022-01-18 05:01:46,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:46,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:46,952 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 05:01:46,953 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 05:01:47,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:01:47,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:47,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:47,326 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 05:01:47,407 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 05:01:47,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:47,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:47,512 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 45 [2022-01-18 05:01:47,639 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 05:01:47,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746805077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:47,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:47,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945968881] [2022-01-18 05:01:47,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:47,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:47,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:47,640 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 05:01:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:47,965 INFO L93 Difference]: Finished difference Result 462 states and 1402 transitions. [2022-01-18 05:01:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:47,965 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 05:01:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:47,966 INFO L225 Difference]: With dead ends: 462 [2022-01-18 05:01:47,966 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 05:01:47,966 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 05:01:47,966 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 05:01:47,966 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 05:01:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 05:01:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 387. [2022-01-18 05:01:47,970 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 05:01:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 05:01:47,970 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 05:01:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:47,970 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 05:01:47,971 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 05:01:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 05:01:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:47,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:47,971 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:47,987 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 05:01:48,187 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 05:01:48,187 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1741936860, now seen corresponding path program 204 times [2022-01-18 05:01:48,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730346666] [2022-01-18 05:01:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:48,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:48,286 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 05:01:48,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730346666] [2022-01-18 05:01:48,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730346666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:48,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501173776] [2022-01-18 05:01:48,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:48,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:48,287 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 05:01:48,288 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 05:01:48,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:01:48,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:48,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:48,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:48,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:48,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:01:48,905 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 05:01:48,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501173776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:48,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:48,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:48,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371989876] [2022-01-18 05:01:48,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:48,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:48,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:48,906 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 05:01:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:49,273 INFO L93 Difference]: Finished difference Result 536 states and 1595 transitions. [2022-01-18 05:01:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:49,274 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 05:01:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:49,275 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:01:49,275 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 05:01:49,275 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 05:01:49,275 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:01:49,275 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 05:01:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 05:01:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 397. [2022-01-18 05:01:49,279 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 05:01:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1241 transitions. [2022-01-18 05:01:49,280 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1241 transitions. Word has length 20 [2022-01-18 05:01:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:49,280 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1241 transitions. [2022-01-18 05:01:49,280 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 05:01:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1241 transitions. [2022-01-18 05:01:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:49,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:49,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:49,297 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 05:01:49,481 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 05:01:49,481 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -859859426, now seen corresponding path program 205 times [2022-01-18 05:01:49,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:49,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435149614] [2022-01-18 05:01:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:49,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435149614] [2022-01-18 05:01:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435149614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944560479] [2022-01-18 05:01:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:49,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:49,558 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 05:01:49,559 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 05:01:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:49,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:49,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:49,964 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 05:01:49,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:50,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:50,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:01:50,150 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 05:01:50,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944560479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:50,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:50,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:50,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961208795] [2022-01-18 05:01:50,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:50,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:50,151 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 05:01:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:50,504 INFO L93 Difference]: Finished difference Result 565 states and 1641 transitions. [2022-01-18 05:01:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:01:50,504 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 05:01:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:50,505 INFO L225 Difference]: With dead ends: 565 [2022-01-18 05:01:50,505 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 05:01:50,505 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 05:01:50,505 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 05:01:50,505 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 05:01:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 05:01:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 400. [2022-01-18 05:01:50,509 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 05:01:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1243 transitions. [2022-01-18 05:01:50,510 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1243 transitions. Word has length 20 [2022-01-18 05:01:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:50,510 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1243 transitions. [2022-01-18 05:01:50,510 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 05:01:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1243 transitions. [2022-01-18 05:01:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:50,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:50,511 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 05:01:50,527 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 05:01:50,711 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 05:01:50,711 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:50,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1001039526, now seen corresponding path program 206 times [2022-01-18 05:01:50,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:50,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034190835] [2022-01-18 05:01:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:50,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:50,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:50,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034190835] [2022-01-18 05:01:50,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034190835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:50,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797435449] [2022-01-18 05:01:50,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:50,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:50,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:50,815 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 05:01:50,815 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 05:01:50,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:51,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:51,243 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 05:01:51,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:51,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:51,412 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 27 treesize of output 27 [2022-01-18 05:01:51,475 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 05:01:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797435449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:51,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:51,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:51,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094765824] [2022-01-18 05:01:51,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:51,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:51,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:51,476 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 05:01:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:51,962 INFO L93 Difference]: Finished difference Result 594 states and 1738 transitions. [2022-01-18 05:01:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:51,962 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 05:01:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:51,963 INFO L225 Difference]: With dead ends: 594 [2022-01-18 05:01:51,963 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 05:01:51,963 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 05:01:51,963 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 05:01:51,963 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 05:01:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 05:01:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2022-01-18 05:01:51,968 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 05:01:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1258 transitions. [2022-01-18 05:01:51,968 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1258 transitions. Word has length 20 [2022-01-18 05:01:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:51,969 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1258 transitions. [2022-01-18 05:01:51,969 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 05:01:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1258 transitions. [2022-01-18 05:01:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:51,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:51,969 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 05:01:51,985 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 05:01:52,169 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 05:01:52,170 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash -6663906, now seen corresponding path program 207 times [2022-01-18 05:01:52,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:52,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114839165] [2022-01-18 05:01:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:52,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:52,286 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 05:01:52,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114839165] [2022-01-18 05:01:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114839165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703499336] [2022-01-18 05:01:52,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:01:52,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:52,288 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 05:01:52,288 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 05:01:52,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:01:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:52,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:52,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:52,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:52,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:01:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:52,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703499336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:52,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:52,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:52,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887866264] [2022-01-18 05:01:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:52,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:52,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:52,868 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 05:01:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:53,441 INFO L93 Difference]: Finished difference Result 623 states and 1798 transitions. [2022-01-18 05:01:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:01:53,441 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 05:01:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:53,442 INFO L225 Difference]: With dead ends: 623 [2022-01-18 05:01:53,442 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 05:01:53,442 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 05:01:53,443 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 05:01:53,443 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 05:01:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 05:01:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 400. [2022-01-18 05:01:53,447 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 05:01:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1243 transitions. [2022-01-18 05:01:53,448 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1243 transitions. Word has length 20 [2022-01-18 05:01:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:53,448 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1243 transitions. [2022-01-18 05:01:53,448 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 05:01:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1243 transitions. [2022-01-18 05:01:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:53,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:53,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:53,465 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 05:01:53,649 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 05:01:53,649 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash 973789226, now seen corresponding path program 208 times [2022-01-18 05:01:53,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456792146] [2022-01-18 05:01:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:53,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:53,727 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 05:01:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456792146] [2022-01-18 05:01:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456792146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863356642] [2022-01-18 05:01:53,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:01:53,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:53,736 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 05:01:53,736 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 05:01:53,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:01:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:54,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:54,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:54,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:54,238 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 27 treesize of output 27 [2022-01-18 05:01:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863356642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:54,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:54,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:54,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397329695] [2022-01-18 05:01:54,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:54,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:54,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:54,298 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 05:01:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:54,693 INFO L93 Difference]: Finished difference Result 582 states and 1690 transitions. [2022-01-18 05:01:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:54,693 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 05:01:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:54,694 INFO L225 Difference]: With dead ends: 582 [2022-01-18 05:01:54,694 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 05:01:54,694 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 05:01:54,695 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 05:01:54,695 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 05:01:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 05:01:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 404. [2022-01-18 05:01:54,699 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 05:01:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1257 transitions. [2022-01-18 05:01:54,700 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1257 transitions. Word has length 20 [2022-01-18 05:01:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:54,700 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1257 transitions. [2022-01-18 05:01:54,700 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 05:01:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1257 transitions. [2022-01-18 05:01:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:54,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:54,700 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 05:01:54,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 05:01:54,901 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 05:01:54,901 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 997689140, now seen corresponding path program 209 times [2022-01-18 05:01:54,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:54,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344563969] [2022-01-18 05:01:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:54,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:55,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344563969] [2022-01-18 05:01:55,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344563969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853205695] [2022-01-18 05:01:55,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:01:55,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:55,007 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 05:01:55,008 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 05:01:55,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:01:55,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:55,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:55,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:01:55,414 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 05:01:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:55,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:55,551 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 05:01:55,612 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 05:01:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853205695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:55,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:55,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804209288] [2022-01-18 05:01:55,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:55,613 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 05:01:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:56,068 INFO L93 Difference]: Finished difference Result 565 states and 1672 transitions. [2022-01-18 05:01:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:56,068 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 05:01:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:56,069 INFO L225 Difference]: With dead ends: 565 [2022-01-18 05:01:56,069 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 05:01:56,069 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 05:01:56,069 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 05:01:56,069 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 05:01:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 05:01:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 401. [2022-01-18 05:01:56,073 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 05:01:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1247 transitions. [2022-01-18 05:01:56,074 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1247 transitions. Word has length 20 [2022-01-18 05:01:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:56,074 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1247 transitions. [2022-01-18 05:01:56,074 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 05:01:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1247 transitions. [2022-01-18 05:01:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:56,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:56,075 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:56,091 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 05:01:56,275 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 05:01:56,275 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2026470592, now seen corresponding path program 210 times [2022-01-18 05:01:56,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:56,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660018376] [2022-01-18 05:01:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:56,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:56,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660018376] [2022-01-18 05:01:56,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660018376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745276428] [2022-01-18 05:01:56,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:01:56,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:56,372 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 05:01:56,372 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 05:01:56,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:01:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:56,716 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 62 treesize of output 48 [2022-01-18 05:01:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:56,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:56,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:56,945 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 27 treesize of output 27 [2022-01-18 05:01:57,010 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 05:01:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745276428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:57,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:57,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:57,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562958799] [2022-01-18 05:01:57,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:57,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:57,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:57,011 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 05:01:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:57,348 INFO L93 Difference]: Finished difference Result 518 states and 1556 transitions. [2022-01-18 05:01:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:57,348 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 05:01:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:57,349 INFO L225 Difference]: With dead ends: 518 [2022-01-18 05:01:57,349 INFO L226 Difference]: Without dead ends: 518 [2022-01-18 05:01:57,349 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 05:01:57,349 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:01:57,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 124 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:01:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-18 05:01:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 402. [2022-01-18 05:01:57,353 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 05:01:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1249 transitions. [2022-01-18 05:01:57,354 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1249 transitions. Word has length 20 [2022-01-18 05:01:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1249 transitions. [2022-01-18 05:01:57,354 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 05:01:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1249 transitions. [2022-01-18 05:01:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:57,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:57,355 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 05:01:57,371 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 05:01:57,555 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 05:01:57,555 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1274121084, now seen corresponding path program 211 times [2022-01-18 05:01:57,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:57,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681916917] [2022-01-18 05:01:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:57,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:57,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681916917] [2022-01-18 05:01:57,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681916917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:57,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481480011] [2022-01-18 05:01:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:01:57,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:57,658 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 05:01:57,658 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 05:01:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:57,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:58,008 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 62 treesize of output 48 [2022-01-18 05:01:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:58,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:58,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:58,223 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 05:01:58,283 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 05:01:58,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481480011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:58,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:58,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:01:58,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174477723] [2022-01-18 05:01:58,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:58,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:01:58,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:01:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:01:58,284 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 05:01:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:58,720 INFO L93 Difference]: Finished difference Result 539 states and 1594 transitions. [2022-01-18 05:01:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:01:58,721 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 05:01:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:58,721 INFO L225 Difference]: With dead ends: 539 [2022-01-18 05:01:58,721 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 05:01:58,722 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 05:01:58,722 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 05:01:58,722 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 05:01:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 05:01:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 391. [2022-01-18 05:01:58,726 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 05:01:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1212 transitions. [2022-01-18 05:01:58,726 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1212 transitions. Word has length 20 [2022-01-18 05:01:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:58,727 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1212 transitions. [2022-01-18 05:01:58,727 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 05:01:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1212 transitions. [2022-01-18 05:01:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:58,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:58,727 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:58,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 05:01:58,927 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 05:01:58,928 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:01:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:01:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1569548266, now seen corresponding path program 212 times [2022-01-18 05:01:58,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:01:58,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988779614] [2022-01-18 05:01:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:01:58,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:01:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:01:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:59,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:01:59,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988779614] [2022-01-18 05:01:59,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988779614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:01:59,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209147712] [2022-01-18 05:01:59,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:01:59,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:01:59,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:01:59,011 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 05:01:59,012 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 05:01:59,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:01:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:01:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:01:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:01:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:01:59,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:01:59,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:01:59,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:01:59,544 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 05:01:59,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209147712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:01:59,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:01:59,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:01:59,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632324374] [2022-01-18 05:01:59,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:01:59,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:01:59,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:01:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:01:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:01:59,545 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 05:01:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:01:59,866 INFO L93 Difference]: Finished difference Result 461 states and 1401 transitions. [2022-01-18 05:01:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:01:59,866 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 05:01:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:01:59,867 INFO L225 Difference]: With dead ends: 461 [2022-01-18 05:01:59,867 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 05:01:59,867 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 05:01:59,867 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 05:01:59,868 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 05:01:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 05:01:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 388. [2022-01-18 05:01:59,871 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 05:01:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1200 transitions. [2022-01-18 05:01:59,872 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1200 transitions. Word has length 20 [2022-01-18 05:01:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:01:59,872 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1200 transitions. [2022-01-18 05:01:59,872 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 05:01:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1200 transitions. [2022-01-18 05:01:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:01:59,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:01:59,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:01:59,889 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 05:02:00,073 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 05:02:00,073 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1888870714, now seen corresponding path program 213 times [2022-01-18 05:02:00,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111421614] [2022-01-18 05:02:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:00,152 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 05:02:00,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111421614] [2022-01-18 05:02:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111421614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497412866] [2022-01-18 05:02:00,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:00,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:00,153 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 05:02:00,153 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 05:02:00,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:00,455 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 54 treesize of output 42 [2022-01-18 05:02:00,498 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 05:02:00,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:00,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:00,623 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 05:02:00,678 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 05:02:00,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497412866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:00,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:00,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:02:00,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053651723] [2022-01-18 05:02:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:00,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:00,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:00,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:00,678 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 05:02:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:00,946 INFO L93 Difference]: Finished difference Result 506 states and 1495 transitions. [2022-01-18 05:02:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:00,946 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 05:02:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:00,947 INFO L225 Difference]: With dead ends: 506 [2022-01-18 05:02:00,947 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 05:02:00,947 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 05:02:00,947 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 05:02:00,947 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 05:02:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 05:02:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 402. [2022-01-18 05:02:00,951 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 05:02:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1239 transitions. [2022-01-18 05:02:00,952 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1239 transitions. Word has length 20 [2022-01-18 05:02:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:00,952 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1239 transitions. [2022-01-18 05:02:00,952 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 05:02:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1239 transitions. [2022-01-18 05:02:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:00,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:00,952 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:00,968 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 05:02:01,153 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 05:02:01,153 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1912770628, now seen corresponding path program 214 times [2022-01-18 05:02:01,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604377336] [2022-01-18 05:02:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:01,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:01,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604377336] [2022-01-18 05:02:01,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604377336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807949393] [2022-01-18 05:02:01,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:01,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:01,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:01,246 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 05:02:01,247 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 05:02:01,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:01,549 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 54 treesize of output 42 [2022-01-18 05:02:01,600 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 05:02:01,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:01,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:01,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:01,803 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 05:02:01,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807949393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:01,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:01,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:02:01,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763422233] [2022-01-18 05:02:01,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:01,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:02:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:02:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:02:01,804 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 05:02:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:02,147 INFO L93 Difference]: Finished difference Result 512 states and 1516 transitions. [2022-01-18 05:02:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:02:02,147 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 05:02:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:02,148 INFO L225 Difference]: With dead ends: 512 [2022-01-18 05:02:02,148 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 05:02:02,148 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 05:02:02,148 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 05:02:02,148 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 05:02:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 05:02:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 400. [2022-01-18 05:02:02,152 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 05:02:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1234 transitions. [2022-01-18 05:02:02,153 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1234 transitions. Word has length 20 [2022-01-18 05:02:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1234 transitions. [2022-01-18 05:02:02,153 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 05:02:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1234 transitions. [2022-01-18 05:02:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:02,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:02,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:02,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 05:02:02,354 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 05:02:02,354 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash -899061730, now seen corresponding path program 215 times [2022-01-18 05:02:02,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:02,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931482236] [2022-01-18 05:02:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:02,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:02,432 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 05:02:02,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:02,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931482236] [2022-01-18 05:02:02,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931482236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:02,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314313394] [2022-01-18 05:02:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:02,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:02,434 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 05:02:02,434 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 05:02:02,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:02:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:02,744 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 05:02:02,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:02,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:02,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:02,929 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 05:02:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314313394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:02,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:02:02,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783433248] [2022-01-18 05:02:02,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:02,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:02,930 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 05:02:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:03,200 INFO L93 Difference]: Finished difference Result 481 states and 1451 transitions. [2022-01-18 05:02:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:03,200 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 05:02:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:03,201 INFO L225 Difference]: With dead ends: 481 [2022-01-18 05:02:03,201 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 05:02:03,201 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 05:02:03,202 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 05:02:03,202 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 05:02:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 05:02:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 387. [2022-01-18 05:02:03,205 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 05:02:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 05:02:03,206 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 05:02:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:03,206 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 05:02:03,206 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 05:02:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 05:02:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:03,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:03,207 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 05:02:03,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:03,415 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 05:02:03,415 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1354652468, now seen corresponding path program 216 times [2022-01-18 05:02:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459189247] [2022-01-18 05:02:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:03,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:03,493 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 05:02:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:03,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459189247] [2022-01-18 05:02:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459189247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:03,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942813169] [2022-01-18 05:02:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:03,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:03,494 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 05:02:03,495 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 05:02:03,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:02:03,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:03,785 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 54 treesize of output 42 [2022-01-18 05:02:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:03,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:03,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:03,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:04,001 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 05:02:04,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942813169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:04,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:04,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:04,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820367587] [2022-01-18 05:02:04,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:04,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:04,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:04,002 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 05:02:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:04,227 INFO L93 Difference]: Finished difference Result 455 states and 1372 transitions. [2022-01-18 05:02:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:04,228 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 05:02:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:04,228 INFO L225 Difference]: With dead ends: 455 [2022-01-18 05:02:04,228 INFO L226 Difference]: Without dead ends: 443 [2022-01-18 05:02:04,228 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 05:02:04,229 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 05:02:04,229 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 05:02:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-18 05:02:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 391. [2022-01-18 05:02:04,232 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 05:02:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1206 transitions. [2022-01-18 05:02:04,233 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1206 transitions. Word has length 20 [2022-01-18 05:02:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1206 transitions. [2022-01-18 05:02:04,233 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 05:02:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1206 transitions. [2022-01-18 05:02:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:04,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:04,234 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:04,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:04,434 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 05:02:04,434 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2095549802, now seen corresponding path program 217 times [2022-01-18 05:02:04,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:04,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613597202] [2022-01-18 05:02:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:04,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:04,503 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 05:02:04,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613597202] [2022-01-18 05:02:04,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613597202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998310141] [2022-01-18 05:02:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:04,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:04,504 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 05:02:04,505 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 05:02:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:04,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:04,819 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 05:02:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:04,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:04,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:04,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998310141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:04,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:04,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:02:04,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741204766] [2022-01-18 05:02:04,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:04,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:04,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:05,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:05,000 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 05:02:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:05,251 INFO L93 Difference]: Finished difference Result 480 states and 1424 transitions. [2022-01-18 05:02:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:05,251 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 05:02:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:05,252 INFO L225 Difference]: With dead ends: 480 [2022-01-18 05:02:05,252 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 05:02:05,252 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 05:02:05,252 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 05:02:05,252 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 05:02:05,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 05:02:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 401. [2022-01-18 05:02:05,256 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 05:02:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1233 transitions. [2022-01-18 05:02:05,256 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1233 transitions. Word has length 20 [2022-01-18 05:02:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:05,257 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1233 transitions. [2022-01-18 05:02:05,257 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 05:02:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1233 transitions. [2022-01-18 05:02:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:05,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:05,257 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 05:02:05,273 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 05:02:05,457 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 05:02:05,458 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2119449716, now seen corresponding path program 218 times [2022-01-18 05:02:05,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570039861] [2022-01-18 05:02:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:05,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:05,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570039861] [2022-01-18 05:02:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570039861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39549588] [2022-01-18 05:02:05,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:05,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:05,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:05,548 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 05:02:05,549 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 05:02:05,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:05,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:05,874 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 05:02:05,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:05,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:05,948 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 05:02:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:06,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39549588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:06,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:06,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:06,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503943009] [2022-01-18 05:02:06,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:06,077 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 05:02:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:06,312 INFO L93 Difference]: Finished difference Result 451 states and 1370 transitions. [2022-01-18 05:02:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:06,313 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 05:02:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:06,313 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:02:06,313 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 05:02:06,313 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 05:02:06,314 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 05:02:06,314 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 05:02:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 05:02:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 389. [2022-01-18 05:02:06,317 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 05:02:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1201 transitions. [2022-01-18 05:02:06,318 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1201 transitions. Word has length 20 [2022-01-18 05:02:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:06,318 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1201 transitions. [2022-01-18 05:02:06,318 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 05:02:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1201 transitions. [2022-01-18 05:02:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:06,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:06,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:06,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 05:02:06,519 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 05:02:06,519 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash 828092624, now seen corresponding path program 219 times [2022-01-18 05:02:06,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387102819] [2022-01-18 05:02:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:06,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:06,585 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 05:02:06,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387102819] [2022-01-18 05:02:06,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387102819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986235448] [2022-01-18 05:02:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:06,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:06,586 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 05:02:06,586 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 05:02:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:06,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:06,872 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 05:02:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:06,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:06,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:07,025 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 05:02:07,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986235448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:07,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:07,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:02:07,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028053361] [2022-01-18 05:02:07,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:07,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:02:07,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:02:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:02:07,026 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 05:02:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:07,246 INFO L93 Difference]: Finished difference Result 486 states and 1439 transitions. [2022-01-18 05:02:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:07,246 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 05:02:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:07,247 INFO L225 Difference]: With dead ends: 486 [2022-01-18 05:02:07,247 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 05:02:07,247 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 05:02:07,247 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 05:02:07,247 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 05:02:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 05:02:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 403. [2022-01-18 05:02:07,251 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 05:02:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1240 transitions. [2022-01-18 05:02:07,252 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1240 transitions. Word has length 20 [2022-01-18 05:02:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:07,252 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1240 transitions. [2022-01-18 05:02:07,252 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 05:02:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1240 transitions. [2022-01-18 05:02:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:07,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:07,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:07,268 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 05:02:07,453 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 05:02:07,453 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 851992538, now seen corresponding path program 220 times [2022-01-18 05:02:07,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:07,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932363435] [2022-01-18 05:02:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:07,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:07,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932363435] [2022-01-18 05:02:07,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932363435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100809120] [2022-01-18 05:02:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:07,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:07,550 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 05:02:07,551 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 05:02:07,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:07,800 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 05:02:07,849 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 05:02:07,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:07,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:07,949 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 27 treesize of output 27 [2022-01-18 05:02:08,021 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 05:02:08,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100809120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:08,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:08,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:02:08,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736157926] [2022-01-18 05:02:08,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:08,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:02:08,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:02:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:02:08,022 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 05:02:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:08,306 INFO L93 Difference]: Finished difference Result 486 states and 1445 transitions. [2022-01-18 05:02:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:02:08,306 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 05:02:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:08,307 INFO L225 Difference]: With dead ends: 486 [2022-01-18 05:02:08,307 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 05:02:08,307 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 05:02:08,307 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:02:08,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 171 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:02:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 05:02:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 401. [2022-01-18 05:02:08,311 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 05:02:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1235 transitions. [2022-01-18 05:02:08,312 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1235 transitions. Word has length 20 [2022-01-18 05:02:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:08,312 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1235 transitions. [2022-01-18 05:02:08,312 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 05:02:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1235 transitions. [2022-01-18 05:02:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:08,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:08,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:08,329 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 05:02:08,513 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 05:02:08,513 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1959839820, now seen corresponding path program 221 times [2022-01-18 05:02:08,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:08,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290144817] [2022-01-18 05:02:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:08,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:08,582 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 05:02:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290144817] [2022-01-18 05:02:08,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290144817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:08,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904176609] [2022-01-18 05:02:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:08,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:08,583 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 05:02:08,583 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 05:02:08,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:02:08,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:08,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:08,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:08,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:08,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:08,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904176609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:08,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:08,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:02:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956436704] [2022-01-18 05:02:08,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:02:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:02:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:02:08,989 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 05:02:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:09,253 INFO L93 Difference]: Finished difference Result 461 states and 1395 transitions. [2022-01-18 05:02:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:09,254 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 05:02:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:09,254 INFO L225 Difference]: With dead ends: 461 [2022-01-18 05:02:09,254 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 05:02:09,254 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 05:02:09,254 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 05:02:09,255 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 05:02:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 05:02:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 386. [2022-01-18 05:02:09,258 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 05:02:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 05:02:09,259 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 05:02:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 05:02:09,259 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 05:02:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 05:02:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:09,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:09,259 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 05:02:09,282 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 05:02:09,479 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 05:02:09,479 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash -617145956, now seen corresponding path program 222 times [2022-01-18 05:02:09,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711955521] [2022-01-18 05:02:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:09,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:09,544 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 05:02:09,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:09,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711955521] [2022-01-18 05:02:09,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711955521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:09,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033281753] [2022-01-18 05:02:09,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:09,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:09,546 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 05:02:09,546 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 05:02:09,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:02:09,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:09,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:09,804 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 05:02:09,830 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 05:02:09,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:09,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:09,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:09,967 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 05:02:09,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033281753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:09,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:09,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 05:02:09,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643135180] [2022-01-18 05:02:09,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:09,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:09,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:09,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:09,968 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 05:02:10,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:10,237 INFO L93 Difference]: Finished difference Result 519 states and 1530 transitions. [2022-01-18 05:02:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:10,237 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 05:02:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:10,238 INFO L225 Difference]: With dead ends: 519 [2022-01-18 05:02:10,238 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 05:02:10,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 05:02:10,238 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 05:02:10,238 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 05:02:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 05:02:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 390. [2022-01-18 05:02:10,242 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 05:02:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1202 transitions. [2022-01-18 05:02:10,242 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1202 transitions. Word has length 20 [2022-01-18 05:02:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:10,242 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1202 transitions. [2022-01-18 05:02:10,243 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 05:02:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1202 transitions. [2022-01-18 05:02:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:10,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:10,243 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 05:02:10,263 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 05:02:10,460 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 05:02:10,460 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash 972724420, now seen corresponding path program 223 times [2022-01-18 05:02:10,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401164717] [2022-01-18 05:02:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:10,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:10,518 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 05:02:10,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401164717] [2022-01-18 05:02:10,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401164717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513478572] [2022-01-18 05:02:10,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:10,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:10,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:10,520 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 05:02:10,520 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 05:02:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:10,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:10,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:10,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:10,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:10,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:10,948 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 05:02:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513478572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:10,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:10,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:02:10,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977892944] [2022-01-18 05:02:10,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:10,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:02:10,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:02:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:02:10,949 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 05:02:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:11,133 INFO L93 Difference]: Finished difference Result 515 states and 1522 transitions. [2022-01-18 05:02:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:11,133 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 05:02:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:11,134 INFO L225 Difference]: With dead ends: 515 [2022-01-18 05:02:11,134 INFO L226 Difference]: Without dead ends: 503 [2022-01-18 05:02:11,134 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 05:02:11,134 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 05:02:11,134 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 05:02:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-18 05:02:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 392. [2022-01-18 05:02:11,138 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 05:02:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1207 transitions. [2022-01-18 05:02:11,139 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1207 transitions. Word has length 20 [2022-01-18 05:02:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:11,139 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1207 transitions. [2022-01-18 05:02:11,139 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 05:02:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1207 transitions. [2022-01-18 05:02:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:11,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:11,140 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 05:02:11,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:11,351 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 05:02:11,351 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1713621754, now seen corresponding path program 224 times [2022-01-18 05:02:11,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373692390] [2022-01-18 05:02:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:11,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:11,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373692390] [2022-01-18 05:02:11,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373692390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107128299] [2022-01-18 05:02:11,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:11,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:11,434 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 05:02:11,434 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 05:02:11,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:11,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:11,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:11,768 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 05:02:11,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:11,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:11,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:11,926 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 05:02:11,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107128299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:11,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:11,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:02:11,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965432050] [2022-01-18 05:02:11,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:11,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:02:11,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:02:11,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:02:11,927 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 05:02:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:12,347 INFO L93 Difference]: Finished difference Result 540 states and 1574 transitions. [2022-01-18 05:02:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:12,347 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 05:02:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:12,348 INFO L225 Difference]: With dead ends: 540 [2022-01-18 05:02:12,348 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 05:02:12,348 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 05:02:12,348 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 05:02:12,348 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 05:02:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 05:02:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 402. [2022-01-18 05:02:12,353 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 05:02:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1234 transitions. [2022-01-18 05:02:12,353 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1234 transitions. Word has length 20 [2022-01-18 05:02:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:12,353 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1234 transitions. [2022-01-18 05:02:12,353 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 05:02:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1234 transitions. [2022-01-18 05:02:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:12,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:12,354 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:12,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:12,567 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 05:02:12,567 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1737521668, now seen corresponding path program 225 times [2022-01-18 05:02:12,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107205132] [2022-01-18 05:02:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:12,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:12,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107205132] [2022-01-18 05:02:12,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107205132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818910921] [2022-01-18 05:02:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:12,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:12,633 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 05:02:12,633 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 05:02:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:12,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:12,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:12,959 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 05:02:12,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:13,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:13,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:13,116 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 05:02:13,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818910921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:13,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:13,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:02:13,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33769916] [2022-01-18 05:02:13,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:13,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:13,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:13,117 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 05:02:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:13,303 INFO L93 Difference]: Finished difference Result 511 states and 1520 transitions. [2022-01-18 05:02:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:13,303 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 05:02:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:13,304 INFO L225 Difference]: With dead ends: 511 [2022-01-18 05:02:13,304 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 05:02:13,304 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 05:02:13,304 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 05:02:13,304 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 05:02:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 05:02:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 388. [2022-01-18 05:02:13,308 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 05:02:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 05:02:13,309 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 05:02:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:13,309 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 05:02:13,309 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 05:02:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 05:02:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:13,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:13,310 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 05:02:13,326 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 05:02:13,510 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 05:02:13,510 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 548413184, now seen corresponding path program 226 times [2022-01-18 05:02:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161602618] [2022-01-18 05:02:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:13,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161602618] [2022-01-18 05:02:13,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161602618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056602158] [2022-01-18 05:02:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:13,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:13,578 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 05:02:13,578 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 05:02:13,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:13,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:13,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:13,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:13,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:14,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056602158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:14,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:14,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 05:02:14,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676799702] [2022-01-18 05:02:14,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:14,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:14,045 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 05:02:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:14,272 INFO L93 Difference]: Finished difference Result 452 states and 1363 transitions. [2022-01-18 05:02:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:14,272 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 05:02:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:14,273 INFO L225 Difference]: With dead ends: 452 [2022-01-18 05:02:14,273 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 05:02:14,273 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 05:02:14,274 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 05:02:14,274 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 05:02:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 05:02:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 392. [2022-01-18 05:02:14,277 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 05:02:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1207 transitions. [2022-01-18 05:02:14,278 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1207 transitions. Word has length 20 [2022-01-18 05:02:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1207 transitions. [2022-01-18 05:02:14,278 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 05:02:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1207 transitions. [2022-01-18 05:02:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:14,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:14,279 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:14,295 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 05:02:14,479 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 05:02:14,479 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:14,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1289310518, now seen corresponding path program 227 times [2022-01-18 05:02:14,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:14,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460240006] [2022-01-18 05:02:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:14,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:14,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460240006] [2022-01-18 05:02:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460240006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:14,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191111999] [2022-01-18 05:02:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:14,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:14,552 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 05:02:14,552 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 05:02:14,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:14,786 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 72 treesize of output 56 [2022-01-18 05:02:14,875 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 05:02:14,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:14,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:14,940 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 05:02:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191111999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:15,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:02:15,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641518975] [2022-01-18 05:02:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:15,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:02:15,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:02:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:02:15,041 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 05:02:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:15,253 INFO L93 Difference]: Finished difference Result 477 states and 1415 transitions. [2022-01-18 05:02:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:15,253 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 05:02:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:15,254 INFO L225 Difference]: With dead ends: 477 [2022-01-18 05:02:15,254 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 05:02:15,254 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 05:02:15,254 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 05:02:15,254 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 05:02:15,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 05:02:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 402. [2022-01-18 05:02:15,258 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 05:02:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1234 transitions. [2022-01-18 05:02:15,259 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1234 transitions. Word has length 20 [2022-01-18 05:02:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:15,259 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1234 transitions. [2022-01-18 05:02:15,259 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 05:02:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1234 transitions. [2022-01-18 05:02:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:15,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:15,259 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 05:02:15,275 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 05:02:15,460 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 05:02:15,460 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1313210432, now seen corresponding path program 228 times [2022-01-18 05:02:15,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772610682] [2022-01-18 05:02:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:15,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:15,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772610682] [2022-01-18 05:02:15,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772610682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641334531] [2022-01-18 05:02:15,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:15,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:15,542 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 05:02:15,542 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 05:02:15,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:02:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:15,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:15,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:15,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:15,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:16,039 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 05:02:16,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641334531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:16,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:16,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:02:16,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463979557] [2022-01-18 05:02:16,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:16,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:02:16,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:02:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:02:16,040 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 05:02:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:16,239 INFO L93 Difference]: Finished difference Result 448 states and 1361 transitions. [2022-01-18 05:02:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:16,239 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 05:02:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:16,240 INFO L225 Difference]: With dead ends: 448 [2022-01-18 05:02:16,240 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 05:02:16,240 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 05:02:16,240 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 05:02:16,240 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 05:02:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 05:02:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 390. [2022-01-18 05:02:16,243 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 05:02:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1202 transitions. [2022-01-18 05:02:16,244 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1202 transitions. Word has length 20 [2022-01-18 05:02:16,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:16,244 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1202 transitions. [2022-01-18 05:02:16,244 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 05:02:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1202 transitions. [2022-01-18 05:02:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:16,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:16,245 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:16,261 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 05:02:16,445 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 05:02:16,445 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 21853340, now seen corresponding path program 229 times [2022-01-18 05:02:16,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449595162] [2022-01-18 05:02:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:16,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:16,503 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 05:02:16,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:16,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449595162] [2022-01-18 05:02:16,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449595162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:16,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185588024] [2022-01-18 05:02:16,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:16,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:16,504 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 05:02:16,505 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 05:02:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:16,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:16,717 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 05:02:16,756 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 05:02:16,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:16,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:16,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:16,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185588024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:16,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:16,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:02:16,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791572475] [2022-01-18 05:02:16,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:16,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:02:16,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:02:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:02:16,895 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 05:02:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:17,080 INFO L93 Difference]: Finished difference Result 481 states and 1425 transitions. [2022-01-18 05:02:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:17,080 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 05:02:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:17,081 INFO L225 Difference]: With dead ends: 481 [2022-01-18 05:02:17,081 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 05:02:17,081 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 05:02:17,082 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 05:02:17,082 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 05:02:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 05:02:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2022-01-18 05:02:17,086 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 05:02:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1241 transitions. [2022-01-18 05:02:17,086 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1241 transitions. Word has length 20 [2022-01-18 05:02:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1241 transitions. [2022-01-18 05:02:17,086 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 05:02:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1241 transitions. [2022-01-18 05:02:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:17,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:17,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:17,104 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 05:02:17,287 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 05:02:17,287 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 45753254, now seen corresponding path program 230 times [2022-01-18 05:02:17,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:17,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290842682] [2022-01-18 05:02:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:17,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:17,377 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 05:02:17,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290842682] [2022-01-18 05:02:17,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290842682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650094253] [2022-01-18 05:02:17,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:17,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:17,378 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 05:02:17,379 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 05:02:17,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:17,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:17,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:17,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:17,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:17,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:17,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:17,836 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 05:02:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650094253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:17,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:17,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:17,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371715239] [2022-01-18 05:02:17,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:17,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:17,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:17,837 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 05:02:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:18,100 INFO L93 Difference]: Finished difference Result 481 states and 1431 transitions. [2022-01-18 05:02:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:02:18,101 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 05:02:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:18,101 INFO L225 Difference]: With dead ends: 481 [2022-01-18 05:02:18,101 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 05:02:18,101 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 05:02:18,101 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 05:02:18,102 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 05:02:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 05:02:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 402. [2022-01-18 05:02:18,105 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 05:02:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1236 transitions. [2022-01-18 05:02:18,106 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1236 transitions. Word has length 20 [2022-01-18 05:02:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:18,106 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1236 transitions. [2022-01-18 05:02:18,106 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 05:02:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1236 transitions. [2022-01-18 05:02:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:18,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:18,107 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 05:02:18,123 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 05:02:18,307 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 05:02:18,307 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1528888192, now seen corresponding path program 231 times [2022-01-18 05:02:18,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056345815] [2022-01-18 05:02:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:18,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:18,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:18,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056345815] [2022-01-18 05:02:18,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056345815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:18,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710814618] [2022-01-18 05:02:18,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:18,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:18,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:18,382 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 05:02:18,383 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 05:02:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:18,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:18,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:18,721 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 05:02:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:18,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710814618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:18,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:02:18,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149066046] [2022-01-18 05:02:18,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:18,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:02:18,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:02:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:02:18,770 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 05:02:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:18,941 INFO L93 Difference]: Finished difference Result 456 states and 1381 transitions. [2022-01-18 05:02:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:18,941 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 05:02:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:18,942 INFO L225 Difference]: With dead ends: 456 [2022-01-18 05:02:18,942 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 05:02:18,942 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 05:02:18,942 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 05:02:18,942 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 05:02:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 05:02:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 388. [2022-01-18 05:02:18,946 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 05:02:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 05:02:18,946 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 05:02:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:18,946 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 05:02:18,947 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 05:02:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 05:02:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:18,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:18,947 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 05:02:18,963 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 05:02:19,147 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 05:02:19,148 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash -586696698, now seen corresponding path program 232 times [2022-01-18 05:02:19,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:19,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324221285] [2022-01-18 05:02:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:19,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:19,235 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 05:02:19,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:19,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324221285] [2022-01-18 05:02:19,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324221285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:19,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915577900] [2022-01-18 05:02:19,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:19,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:19,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:19,237 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 05:02:19,237 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 05:02:19,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:19,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:19,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:19,468 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 54 treesize of output 42 [2022-01-18 05:02:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:19,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:19,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:19,662 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 05:02:19,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915577900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:19,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:19,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:19,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92882968] [2022-01-18 05:02:19,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:19,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:19,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:19,662 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 05:02:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:19,935 INFO L93 Difference]: Finished difference Result 494 states and 1476 transitions. [2022-01-18 05:02:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:19,935 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 05:02:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:19,936 INFO L225 Difference]: With dead ends: 494 [2022-01-18 05:02:19,936 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 05:02:19,936 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 05:02:19,936 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 05:02:19,936 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 05:02:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 05:02:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 398. [2022-01-18 05:02:19,940 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 05:02:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1223 transitions. [2022-01-18 05:02:19,940 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1223 transitions. Word has length 20 [2022-01-18 05:02:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:19,940 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1223 transitions. [2022-01-18 05:02:19,940 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 05:02:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1223 transitions. [2022-01-18 05:02:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:19,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:19,941 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:19,957 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 05:02:20,141 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 05:02:20,141 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1438185292, now seen corresponding path program 233 times [2022-01-18 05:02:20,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:20,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228439617] [2022-01-18 05:02:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:20,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:20,220 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 05:02:20,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:20,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228439617] [2022-01-18 05:02:20,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228439617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:20,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344372390] [2022-01-18 05:02:20,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:20,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:20,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:20,221 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 05:02:20,221 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 05:02:20,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:20,463 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 05:02:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:20,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:20,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:20,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344372390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:20,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:20,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039465714] [2022-01-18 05:02:20,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:20,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:20,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:20,698 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 05:02:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:21,017 INFO L93 Difference]: Finished difference Result 546 states and 1597 transitions. [2022-01-18 05:02:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:21,017 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 05:02:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:21,018 INFO L225 Difference]: With dead ends: 546 [2022-01-18 05:02:21,018 INFO L226 Difference]: Without dead ends: 546 [2022-01-18 05:02:21,018 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 05:02:21,018 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 05:02:21,018 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 05:02:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-18 05:02:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 401. [2022-01-18 05:02:21,022 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 05:02:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1234 transitions. [2022-01-18 05:02:21,023 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1234 transitions. Word has length 20 [2022-01-18 05:02:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:21,023 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1234 transitions. [2022-01-18 05:02:21,023 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 05:02:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1234 transitions. [2022-01-18 05:02:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:21,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:21,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:21,039 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 05:02:21,224 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 05:02:21,224 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1974704570, now seen corresponding path program 234 times [2022-01-18 05:02:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421836289] [2022-01-18 05:02:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:21,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:21,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421836289] [2022-01-18 05:02:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421836289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118985636] [2022-01-18 05:02:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:21,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:21,300 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 05:02:21,301 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 05:02:21,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:02:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:21,545 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 54 treesize of output 42 [2022-01-18 05:02:21,608 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 05:02:21,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:21,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:21,696 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 05:02:21,756 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 05:02:21,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118985636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:21,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:21,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:02:21,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969741995] [2022-01-18 05:02:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:21,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:02:21,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:02:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:02:21,757 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 05:02:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:22,043 INFO L93 Difference]: Finished difference Result 503 states and 1494 transitions. [2022-01-18 05:02:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:22,044 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 05:02:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:22,044 INFO L225 Difference]: With dead ends: 503 [2022-01-18 05:02:22,044 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 05:02:22,044 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 05:02:22,044 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 05:02:22,045 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 05:02:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 05:02:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 393. [2022-01-18 05:02:22,048 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 05:02:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1210 transitions. [2022-01-18 05:02:22,049 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1210 transitions. Word has length 20 [2022-01-18 05:02:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1210 transitions. [2022-01-18 05:02:22,049 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 05:02:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1210 transitions. [2022-01-18 05:02:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:22,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:22,050 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 05:02:22,066 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 05:02:22,250 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 05:02:22,250 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 931839026, now seen corresponding path program 235 times [2022-01-18 05:02:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133409548] [2022-01-18 05:02:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:22,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:22,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133409548] [2022-01-18 05:02:22,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133409548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510506990] [2022-01-18 05:02:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:22,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:22,334 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 05:02:22,334 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 05:02:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:22,645 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 65 treesize of output 51 [2022-01-18 05:02:22,707 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 05:02:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:22,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:22,817 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 49 treesize of output 45 [2022-01-18 05:02:22,881 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 05:02:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510506990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:22,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:22,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:22,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491075237] [2022-01-18 05:02:22,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:22,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:22,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:22,882 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 05:02:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:23,155 INFO L93 Difference]: Finished difference Result 472 states and 1410 transitions. [2022-01-18 05:02:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:23,155 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 05:02:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:23,156 INFO L225 Difference]: With dead ends: 472 [2022-01-18 05:02:23,156 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:02:23,156 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 05:02:23,156 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 05:02:23,156 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 05:02:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:02:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 399. [2022-01-18 05:02:23,160 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 05:02:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1232 transitions. [2022-01-18 05:02:23,161 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1232 transitions. Word has length 20 [2022-01-18 05:02:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:23,161 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1232 transitions. [2022-01-18 05:02:23,161 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 05:02:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1232 transitions. [2022-01-18 05:02:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:23,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:23,161 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 05:02:23,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:23,362 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 05:02:23,362 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1813916460, now seen corresponding path program 236 times [2022-01-18 05:02:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:23,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552756432] [2022-01-18 05:02:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:23,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:23,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552756432] [2022-01-18 05:02:23,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552756432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17361049] [2022-01-18 05:02:23,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:23,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:23,443 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 05:02:23,443 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 05:02:23,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:23,738 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 65 treesize of output 51 [2022-01-18 05:02:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:23,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:23,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:23,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:23,948 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 05:02:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17361049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:23,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:23,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:23,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433664965] [2022-01-18 05:02:23,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:23,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:23,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:23,949 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 05:02:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:24,312 INFO L93 Difference]: Finished difference Result 478 states and 1417 transitions. [2022-01-18 05:02:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:02:24,312 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 05:02:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:24,313 INFO L225 Difference]: With dead ends: 478 [2022-01-18 05:02:24,313 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:02:24,313 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 05:02:24,313 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 05:02:24,313 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 05:02:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:02:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 396. [2022-01-18 05:02:24,317 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 05:02:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1221 transitions. [2022-01-18 05:02:24,317 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1221 transitions. Word has length 20 [2022-01-18 05:02:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:24,317 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1221 transitions. [2022-01-18 05:02:24,317 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 05:02:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1221 transitions. [2022-01-18 05:02:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:24,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:24,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:24,334 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 05:02:24,518 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 05:02:24,518 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:24,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1278686658, now seen corresponding path program 237 times [2022-01-18 05:02:24,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:24,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058324423] [2022-01-18 05:02:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:24,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:24,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058324423] [2022-01-18 05:02:24,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058324423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393844172] [2022-01-18 05:02:24,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:24,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:24,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:24,599 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 05:02:24,600 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 05:02:24,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:02:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:24,926 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 54 treesize of output 42 [2022-01-18 05:02:24,950 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 05:02:24,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:25,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:25,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:25,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393844172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:25,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:25,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:25,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851547495] [2022-01-18 05:02:25,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:25,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:25,101 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 05:02:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:25,443 INFO L93 Difference]: Finished difference Result 436 states and 1322 transitions. [2022-01-18 05:02:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:25,443 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 05:02:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:25,444 INFO L225 Difference]: With dead ends: 436 [2022-01-18 05:02:25,444 INFO L226 Difference]: Without dead ends: 424 [2022-01-18 05:02:25,444 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 05:02:25,444 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 05:02:25,444 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 05:02:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-18 05:02:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 388. [2022-01-18 05:02:25,448 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 05:02:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1197 transitions. [2022-01-18 05:02:25,448 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1197 transitions. Word has length 20 [2022-01-18 05:02:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:25,449 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1197 transitions. [2022-01-18 05:02:25,449 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 05:02:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1197 transitions. [2022-01-18 05:02:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:25,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:25,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:25,465 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 05:02:25,649 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 05:02:25,650 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1460726889, now seen corresponding path program 238 times [2022-01-18 05:02:25,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:25,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589568831] [2022-01-18 05:02:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:25,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:25,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589568831] [2022-01-18 05:02:25,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589568831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704476324] [2022-01-18 05:02:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:25,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:25,706 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 05:02:25,706 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 05:02:25,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:25,913 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 24 treesize of output 18 [2022-01-18 05:02:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:25,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:26,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:26,087 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 27 treesize of output 27 [2022-01-18 05:02:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:26,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704476324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:26,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:26,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 05:02:26,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344103358] [2022-01-18 05:02:26,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:26,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:26,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:26,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:26,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:26,109 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 05:02:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:26,360 INFO L93 Difference]: Finished difference Result 523 states and 1575 transitions. [2022-01-18 05:02:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:26,361 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 05:02:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:26,361 INFO L225 Difference]: With dead ends: 523 [2022-01-18 05:02:26,361 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 05:02:26,362 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 05:02:26,362 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 05:02:26,362 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 05:02:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 05:02:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 383. [2022-01-18 05:02:26,365 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 05:02:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1177 transitions. [2022-01-18 05:02:26,366 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1177 transitions. Word has length 20 [2022-01-18 05:02:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:26,366 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1177 transitions. [2022-01-18 05:02:26,366 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 05:02:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1177 transitions. [2022-01-18 05:02:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:26,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:26,366 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:26,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:26,567 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 05:02:26,567 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1548929860, now seen corresponding path program 239 times [2022-01-18 05:02:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:26,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383623141] [2022-01-18 05:02:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:26,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:26,658 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 05:02:26,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383623141] [2022-01-18 05:02:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383623141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622364541] [2022-01-18 05:02:26,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:26,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:26,659 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 05:02:26,660 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 05:02:26,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:26,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:26,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:26,989 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 05:02:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:27,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:27,075 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 49 treesize of output 45 [2022-01-18 05:02:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:27,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622364541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:27,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:27,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:27,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949276596] [2022-01-18 05:02:27,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:27,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:27,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:27,139 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 05:02:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:27,518 INFO L93 Difference]: Finished difference Result 626 states and 1822 transitions. [2022-01-18 05:02:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:27,518 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 05:02:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:27,519 INFO L225 Difference]: With dead ends: 626 [2022-01-18 05:02:27,519 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 05:02:27,519 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 05:02:27,519 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 05:02:27,519 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 05:02:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 05:02:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 395. [2022-01-18 05:02:27,523 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 05:02:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1218 transitions. [2022-01-18 05:02:27,524 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1218 transitions. Word has length 20 [2022-01-18 05:02:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:27,524 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1218 transitions. [2022-01-18 05:02:27,524 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 05:02:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1218 transitions. [2022-01-18 05:02:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:27,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:27,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:27,541 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 05:02:27,725 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 05:02:27,725 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 475952130, now seen corresponding path program 240 times [2022-01-18 05:02:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:27,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421369443] [2022-01-18 05:02:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:27,810 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 05:02:27,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421369443] [2022-01-18 05:02:27,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421369443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746632579] [2022-01-18 05:02:27,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:27,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:27,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:27,812 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 05:02:27,823 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 05:02:27,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:02:27,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:27,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:28,032 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 72 treesize of output 56 [2022-01-18 05:02:28,157 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 05:02:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:28,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:28,259 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 05:02:28,318 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 05:02:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746632579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:28,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:28,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:28,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600040818] [2022-01-18 05:02:28,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:28,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:28,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:28,319 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 05:02:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:28,629 INFO L93 Difference]: Finished difference Result 678 states and 1943 transitions. [2022-01-18 05:02:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:28,630 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 05:02:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:28,631 INFO L225 Difference]: With dead ends: 678 [2022-01-18 05:02:28,631 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 05:02:28,631 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 05:02:28,631 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 05:02:28,631 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 05:02:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 05:02:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 401. [2022-01-18 05:02:28,635 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 05:02:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1243 transitions. [2022-01-18 05:02:28,636 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1243 transitions. Word has length 20 [2022-01-18 05:02:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1243 transitions. [2022-01-18 05:02:28,636 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 05:02:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1243 transitions. [2022-01-18 05:02:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:28,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:28,637 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 05:02:28,653 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 05:02:28,837 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 05:02:28,837 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1358029564, now seen corresponding path program 241 times [2022-01-18 05:02:28,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648979658] [2022-01-18 05:02:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:28,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:28,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648979658] [2022-01-18 05:02:28,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648979658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789287796] [2022-01-18 05:02:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:28,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:28,918 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 05:02:28,919 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 05:02:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:29,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:29,239 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 05:02:29,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:29,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:29,325 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 05:02:29,401 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 05:02:29,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789287796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:29,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:29,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:02:29,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134408956] [2022-01-18 05:02:29,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:02:29,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:02:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:02:29,402 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 05:02:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:29,681 INFO L93 Difference]: Finished difference Result 635 states and 1834 transitions. [2022-01-18 05:02:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:29,681 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 05:02:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:29,682 INFO L225 Difference]: With dead ends: 635 [2022-01-18 05:02:29,682 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 05:02:29,682 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 05:02:29,683 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 05:02:29,683 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 05:02:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 05:02:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 399. [2022-01-18 05:02:29,687 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 05:02:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1232 transitions. [2022-01-18 05:02:29,687 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1232 transitions. Word has length 20 [2022-01-18 05:02:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:29,687 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1232 transitions. [2022-01-18 05:02:29,688 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 05:02:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1232 transitions. [2022-01-18 05:02:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:29,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:29,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:29,704 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 05:02:29,888 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 05:02:29,888 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 824260035, now seen corresponding path program 242 times [2022-01-18 05:02:29,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:29,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910537455] [2022-01-18 05:02:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:29,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:29,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:29,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910537455] [2022-01-18 05:02:29,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910537455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:29,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221580704] [2022-01-18 05:02:29,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:29,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:29,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:29,955 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 05:02:29,956 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 05:02:30,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:30,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:30,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:30,246 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 05:02:30,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:30,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:30,371 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 27 treesize of output 27 [2022-01-18 05:02:30,394 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 05:02:30,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221580704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:30,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 05:02:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872326597] [2022-01-18 05:02:30,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:02:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:02:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:02:30,394 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 05:02:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:30,675 INFO L93 Difference]: Finished difference Result 601 states and 1793 transitions. [2022-01-18 05:02:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:30,676 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 05:02:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:30,676 INFO L225 Difference]: With dead ends: 601 [2022-01-18 05:02:30,676 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 05:02:30,677 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 05:02:30,677 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 05:02:30,677 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 05:02:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 05:02:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 402. [2022-01-18 05:02:30,686 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 05:02:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1247 transitions. [2022-01-18 05:02:30,687 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1247 transitions. Word has length 20 [2022-01-18 05:02:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:30,687 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1247 transitions. [2022-01-18 05:02:30,687 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 05:02:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1247 transitions. [2022-01-18 05:02:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:30,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:30,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:30,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:30,888 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 05:02:30,888 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash -55948986, now seen corresponding path program 243 times [2022-01-18 05:02:30,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:30,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586000260] [2022-01-18 05:02:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:30,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:31,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586000260] [2022-01-18 05:02:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586000260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:31,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038460162] [2022-01-18 05:02:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:31,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:31,008 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 05:02:31,008 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 05:02:31,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:31,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:31,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:31,230 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 72 treesize of output 56 [2022-01-18 05:02:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:31,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:31,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038460162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:31,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:31,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937443338] [2022-01-18 05:02:31,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:31,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:31,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:31,516 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 05:02:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:31,815 INFO L93 Difference]: Finished difference Result 589 states and 1730 transitions. [2022-01-18 05:02:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:31,815 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 05:02:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:31,816 INFO L225 Difference]: With dead ends: 589 [2022-01-18 05:02:31,816 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 05:02:31,816 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 05:02:31,816 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 05:02:31,816 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 05:02:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 05:02:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 388. [2022-01-18 05:02:31,820 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 05:02:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1202 transitions. [2022-01-18 05:02:31,821 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1202 transitions. Word has length 20 [2022-01-18 05:02:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:31,821 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1202 transitions. [2022-01-18 05:02:31,821 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 05:02:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1202 transitions. [2022-01-18 05:02:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:31,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:31,822 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:31,838 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 05:02:32,022 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 05:02:32,022 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1155209474, now seen corresponding path program 244 times [2022-01-18 05:02:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129666334] [2022-01-18 05:02:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:32,120 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 05:02:32,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129666334] [2022-01-18 05:02:32,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129666334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354536548] [2022-01-18 05:02:32,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:32,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:32,122 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 05:02:32,122 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 05:02:32,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:32,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:32,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:32,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:32,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:32,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:32,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354536548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:32,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751529220] [2022-01-18 05:02:32,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:32,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:32,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:32,651 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 05:02:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:33,075 INFO L93 Difference]: Finished difference Result 585 states and 1714 transitions. [2022-01-18 05:02:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:33,076 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 05:02:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:33,077 INFO L225 Difference]: With dead ends: 585 [2022-01-18 05:02:33,077 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 05:02:33,077 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 05:02:33,077 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 05:02:33,077 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 05:02:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 05:02:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 395. [2022-01-18 05:02:33,081 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 05:02:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1231 transitions. [2022-01-18 05:02:33,082 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1231 transitions. Word has length 20 [2022-01-18 05:02:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:33,082 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1231 transitions. [2022-01-18 05:02:33,082 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 05:02:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1231 transitions. [2022-01-18 05:02:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:33,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:33,083 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 05:02:33,098 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 05:02:33,291 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 05:02:33,291 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1865602968, now seen corresponding path program 245 times [2022-01-18 05:02:33,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:33,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607146030] [2022-01-18 05:02:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:33,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:33,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607146030] [2022-01-18 05:02:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607146030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033347414] [2022-01-18 05:02:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:33,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:33,392 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 05:02:33,392 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 05:02:33,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:02:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:33,610 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 05:02:33,737 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 05:02:33,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:33,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:33,864 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 45 [2022-01-18 05:02:33,918 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 05:02:33,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033347414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:33,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:33,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:33,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629720759] [2022-01-18 05:02:33,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:33,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:33,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:33,919 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 05:02:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:34,194 INFO L93 Difference]: Finished difference Result 523 states and 1571 transitions. [2022-01-18 05:02:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:34,194 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 05:02:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:34,195 INFO L225 Difference]: With dead ends: 523 [2022-01-18 05:02:34,195 INFO L226 Difference]: Without dead ends: 523 [2022-01-18 05:02:34,195 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 05:02:34,196 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 05:02:34,196 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 05:02:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-18 05:02:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2022-01-18 05:02:34,200 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 05:02:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1192 transitions. [2022-01-18 05:02:34,200 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1192 transitions. Word has length 20 [2022-01-18 05:02:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:34,200 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1192 transitions. [2022-01-18 05:02:34,200 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 05:02:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1192 transitions. [2022-01-18 05:02:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:34,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:34,201 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 05:02:34,217 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 05:02:34,401 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 05:02:34,401 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:34,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1811751647, now seen corresponding path program 246 times [2022-01-18 05:02:34,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:34,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547400367] [2022-01-18 05:02:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:34,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:34,452 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 05:02:34,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547400367] [2022-01-18 05:02:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547400367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709607352] [2022-01-18 05:02:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:34,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:34,454 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 05:02:34,455 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 05:02:34,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:02:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:34,659 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 54 treesize of output 42 [2022-01-18 05:02:34,731 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 05:02:34,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:34,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:34,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:02:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709607352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:34,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:34,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:02:34,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376983754] [2022-01-18 05:02:34,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:34,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:02:34,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:02:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:02:34,867 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 05:02:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:35,110 INFO L93 Difference]: Finished difference Result 502 states and 1499 transitions. [2022-01-18 05:02:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:35,111 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 05:02:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:35,111 INFO L225 Difference]: With dead ends: 502 [2022-01-18 05:02:35,111 INFO L226 Difference]: Without dead ends: 440 [2022-01-18 05:02:35,112 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 05:02:35,112 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 05:02:35,112 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 05:02:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-18 05:02:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 380. [2022-01-18 05:02:35,115 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 05:02:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1163 transitions. [2022-01-18 05:02:35,116 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1163 transitions. Word has length 20 [2022-01-18 05:02:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:35,116 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1163 transitions. [2022-01-18 05:02:35,116 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 05:02:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1163 transitions. [2022-01-18 05:02:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:35,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:35,116 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 05:02:35,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:35,316 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 05:02:35,317 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1678264498, now seen corresponding path program 247 times [2022-01-18 05:02:35,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:35,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209891436] [2022-01-18 05:02:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:35,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:35,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209891436] [2022-01-18 05:02:35,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209891436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129707639] [2022-01-18 05:02:35,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:35,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:35,412 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 05:02:35,412 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 05:02:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:35,631 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 75 treesize of output 59 [2022-01-18 05:02:35,760 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 05:02:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:35,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:35,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:35,941 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 05:02:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129707639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:35,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223631934] [2022-01-18 05:02:35,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:35,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:35,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:35,942 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 05:02:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:36,248 INFO L93 Difference]: Finished difference Result 623 states and 1825 transitions. [2022-01-18 05:02:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:36,248 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 05:02:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:36,249 INFO L225 Difference]: With dead ends: 623 [2022-01-18 05:02:36,249 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 05:02:36,249 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 05:02:36,249 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 05:02:36,250 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 05:02:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 05:02:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 388. [2022-01-18 05:02:36,254 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 05:02:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1199 transitions. [2022-01-18 05:02:36,255 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1199 transitions. Word has length 20 [2022-01-18 05:02:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:36,255 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1199 transitions. [2022-01-18 05:02:36,255 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 05:02:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1199 transitions. [2022-01-18 05:02:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:36,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:36,255 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 05:02:36,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:36,455 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 05:02:36,456 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1734625364, now seen corresponding path program 248 times [2022-01-18 05:02:36,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:36,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135861334] [2022-01-18 05:02:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:36,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:36,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135861334] [2022-01-18 05:02:36,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135861334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401989079] [2022-01-18 05:02:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:36,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:36,549 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 05:02:36,550 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 05:02:36,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:36,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:36,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:36,921 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 05:02:36,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:37,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:37,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:37,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401989079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:37,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:37,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:37,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645489316] [2022-01-18 05:02:37,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:37,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:37,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:37,095 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 05:02:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:37,395 INFO L93 Difference]: Finished difference Result 609 states and 1774 transitions. [2022-01-18 05:02:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:37,396 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 05:02:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:37,396 INFO L225 Difference]: With dead ends: 609 [2022-01-18 05:02:37,397 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 05:02:37,399 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 05:02:37,399 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 05:02:37,399 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 05:02:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 05:02:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 391. [2022-01-18 05:02:37,404 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 05:02:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1201 transitions. [2022-01-18 05:02:37,404 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1201 transitions. Word has length 20 [2022-01-18 05:02:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:37,404 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1201 transitions. [2022-01-18 05:02:37,404 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 05:02:37,404 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1201 transitions. [2022-01-18 05:02:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:37,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:37,405 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:37,611 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 05:02:37,611 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1875805464, now seen corresponding path program 249 times [2022-01-18 05:02:37,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264110031] [2022-01-18 05:02:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:37,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:37,714 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 05:02:37,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264110031] [2022-01-18 05:02:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264110031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811901947] [2022-01-18 05:02:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:37,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:37,715 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 05:02:37,716 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 05:02:37,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:37,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:37,937 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 72 treesize of output 56 [2022-01-18 05:02:38,069 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 05:02:38,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:38,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:38,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:38,253 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 05:02:38,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811901947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:38,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:38,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:38,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338648810] [2022-01-18 05:02:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:38,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:38,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:38,254 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 05:02:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:38,712 INFO L93 Difference]: Finished difference Result 654 states and 1889 transitions. [2022-01-18 05:02:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:38,712 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 05:02:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:38,713 INFO L225 Difference]: With dead ends: 654 [2022-01-18 05:02:38,713 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 05:02:38,713 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 05:02:38,713 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 05:02:38,713 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 05:02:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 05:02:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 384. [2022-01-18 05:02:38,718 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 05:02:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1183 transitions. [2022-01-18 05:02:38,718 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1183 transitions. Word has length 20 [2022-01-18 05:02:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1183 transitions. [2022-01-18 05:02:38,718 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 05:02:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1183 transitions. [2022-01-18 05:02:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:38,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:38,719 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 05:02:38,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:38,919 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 05:02:38,919 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash -881429844, now seen corresponding path program 250 times [2022-01-18 05:02:38,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41618775] [2022-01-18 05:02:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:38,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:39,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41618775] [2022-01-18 05:02:39,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41618775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947298093] [2022-01-18 05:02:39,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:39,022 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 05:02:39,023 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 05:02:39,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:39,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:39,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:39,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:39,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:39,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:39,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947298093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:39,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:39,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:39,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389286996] [2022-01-18 05:02:39,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:39,588 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 05:02:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:39,876 INFO L93 Difference]: Finished difference Result 588 states and 1741 transitions. [2022-01-18 05:02:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:39,877 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 05:02:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:39,878 INFO L225 Difference]: With dead ends: 588 [2022-01-18 05:02:39,878 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 05:02:39,878 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 05:02:39,878 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 05:02:39,878 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 05:02:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 05:02:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 381. [2022-01-18 05:02:39,882 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 05:02:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1168 transitions. [2022-01-18 05:02:39,883 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1168 transitions. Word has length 20 [2022-01-18 05:02:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:39,883 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1168 transitions. [2022-01-18 05:02:39,883 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 05:02:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1168 transitions. [2022-01-18 05:02:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:39,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:39,884 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:39,900 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 05:02:40,084 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 05:02:40,084 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash 99023288, now seen corresponding path program 251 times [2022-01-18 05:02:40,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978723508] [2022-01-18 05:02:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:40,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:40,177 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 05:02:40,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978723508] [2022-01-18 05:02:40,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978723508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267619867] [2022-01-18 05:02:40,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:40,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:40,178 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 05:02:40,178 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 05:02:40,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:40,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:40,531 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 05:02:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:40,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:40,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:40,695 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 05:02:40,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267619867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:40,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:40,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:40,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160219265] [2022-01-18 05:02:40,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:40,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:40,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:40,696 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 05:02:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:41,019 INFO L93 Difference]: Finished difference Result 560 states and 1643 transitions. [2022-01-18 05:02:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:41,020 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 05:02:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:41,020 INFO L225 Difference]: With dead ends: 560 [2022-01-18 05:02:41,021 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 05:02:41,021 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 05:02:41,021 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 05:02:41,021 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 05:02:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 05:02:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 391. [2022-01-18 05:02:41,025 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 05:02:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1195 transitions. [2022-01-18 05:02:41,026 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1195 transitions. Word has length 20 [2022-01-18 05:02:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:41,026 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1195 transitions. [2022-01-18 05:02:41,026 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 05:02:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1195 transitions. [2022-01-18 05:02:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:41,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:41,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:41,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-01-18 05:02:41,226 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 05:02:41,227 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 122923202, now seen corresponding path program 252 times [2022-01-18 05:02:41,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236142603] [2022-01-18 05:02:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:41,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:41,329 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 05:02:41,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236142603] [2022-01-18 05:02:41,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236142603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779691926] [2022-01-18 05:02:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:41,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:41,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:41,330 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 05:02:41,331 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 05:02:41,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:02:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:41,549 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 72 treesize of output 56 [2022-01-18 05:02:41,678 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 05:02:41,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:41,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:41,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:41,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779691926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:41,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:41,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:41,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6160725] [2022-01-18 05:02:41,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:41,859 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 05:02:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:42,121 INFO L93 Difference]: Finished difference Result 531 states and 1589 transitions. [2022-01-18 05:02:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:42,122 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 05:02:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:42,122 INFO L225 Difference]: With dead ends: 531 [2022-01-18 05:02:42,122 INFO L226 Difference]: Without dead ends: 531 [2022-01-18 05:02:42,122 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 05:02:42,123 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 05:02:42,123 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 05:02:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-18 05:02:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 378. [2022-01-18 05:02:42,126 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 05:02:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1155 transitions. [2022-01-18 05:02:42,127 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1155 transitions. Word has length 20 [2022-01-18 05:02:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:42,127 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1155 transitions. [2022-01-18 05:02:42,127 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 05:02:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1155 transitions. [2022-01-18 05:02:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:42,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:42,128 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:42,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:42,328 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 05:02:42,329 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:42,329 INFO L85 PathProgramCache]: Analyzing trace with hash -451183230, now seen corresponding path program 253 times [2022-01-18 05:02:42,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:42,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238451937] [2022-01-18 05:02:42,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:42,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:42,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238451937] [2022-01-18 05:02:42,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238451937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907551044] [2022-01-18 05:02:42,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:42,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:42,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:42,431 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 05:02:42,432 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 05:02:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:42,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:42,804 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 65 treesize of output 51 [2022-01-18 05:02:42,868 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 05:02:42,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:43,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:43,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:43,058 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 05:02:43,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907551044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:43,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:43,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059497805] [2022-01-18 05:02:43,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:43,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:43,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:43,059 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 05:02:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:43,454 INFO L93 Difference]: Finished difference Result 452 states and 1343 transitions. [2022-01-18 05:02:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:43,454 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 05:02:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:43,455 INFO L225 Difference]: With dead ends: 452 [2022-01-18 05:02:43,455 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:02:43,455 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 05:02:43,455 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:02:43,455 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 05:02:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:02:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 385. [2022-01-18 05:02:43,459 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 05:02:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1182 transitions. [2022-01-18 05:02:43,459 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1182 transitions. Word has length 20 [2022-01-18 05:02:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:43,459 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1182 transitions. [2022-01-18 05:02:43,460 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 05:02:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1182 transitions. [2022-01-18 05:02:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:43,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:43,460 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:43,476 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 05:02:43,671 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 05:02:43,671 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash 430894204, now seen corresponding path program 254 times [2022-01-18 05:02:43,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044381956] [2022-01-18 05:02:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:43,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:43,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044381956] [2022-01-18 05:02:43,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044381956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750747103] [2022-01-18 05:02:43,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:43,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:43,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:43,770 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 05:02:43,771 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 05:02:43,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:43,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:44,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:44,183 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 05:02:44,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:44,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:44,300 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 49 treesize of output 45 [2022-01-18 05:02:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:44,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750747103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:44,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:44,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:44,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906885210] [2022-01-18 05:02:44,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:44,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:44,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:44,361 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 05:02:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:44,791 INFO L93 Difference]: Finished difference Result 458 states and 1350 transitions. [2022-01-18 05:02:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:02:44,792 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 05:02:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:44,793 INFO L225 Difference]: With dead ends: 458 [2022-01-18 05:02:44,793 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:02:44,793 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 05:02:44,793 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 05:02:44,794 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 05:02:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:02:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 382. [2022-01-18 05:02:44,797 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 05:02:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1171 transitions. [2022-01-18 05:02:44,798 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1171 transitions. Word has length 20 [2022-01-18 05:02:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:44,798 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1171 transitions. [2022-01-18 05:02:44,798 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 05:02:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1171 transitions. [2022-01-18 05:02:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:44,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:44,798 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 05:02:44,815 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 05:02:45,004 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 05:02:45,004 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash -104335598, now seen corresponding path program 255 times [2022-01-18 05:02:45,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:45,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999432857] [2022-01-18 05:02:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:45,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:45,100 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 05:02:45,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999432857] [2022-01-18 05:02:45,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999432857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:45,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827479749] [2022-01-18 05:02:45,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:45,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:45,102 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 05:02:45,107 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 05:02:45,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:02:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:45,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:45,523 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 05:02:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:45,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:45,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:45,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827479749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:45,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:45,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:45,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672690305] [2022-01-18 05:02:45,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:45,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:45,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:45,695 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 05:02:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:46,193 INFO L93 Difference]: Finished difference Result 422 states and 1268 transitions. [2022-01-18 05:02:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:46,193 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 05:02:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:46,194 INFO L225 Difference]: With dead ends: 422 [2022-01-18 05:02:46,194 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 05:02:46,194 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 05:02:46,194 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 05:02:46,194 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 05:02:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 05:02:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 379. [2022-01-18 05:02:46,197 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 05:02:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1160 transitions. [2022-01-18 05:02:46,198 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1160 transitions. Word has length 20 [2022-01-18 05:02:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:46,198 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1160 transitions. [2022-01-18 05:02:46,198 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 05:02:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1160 transitions. [2022-01-18 05:02:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:46,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:46,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:46,215 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 05:02:46,399 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 05:02:46,399 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1041797644, now seen corresponding path program 256 times [2022-01-18 05:02:46,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156160641] [2022-01-18 05:02:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:46,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:46,503 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 05:02:46,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156160641] [2022-01-18 05:02:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156160641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735324223] [2022-01-18 05:02:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:46,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:46,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:46,505 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 05:02:46,506 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 05:02:46,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:46,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:46,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:47,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:47,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:47,176 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 05:02:47,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735324223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:47,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:47,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:47,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23065777] [2022-01-18 05:02:47,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:47,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:47,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:47,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:47,176 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 05:02:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:47,644 INFO L93 Difference]: Finished difference Result 536 states and 1553 transitions. [2022-01-18 05:02:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:47,644 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 05:02:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:47,645 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:02:47,645 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 05:02:47,645 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 05:02:47,645 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 05:02:47,645 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 05:02:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 05:02:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 387. [2022-01-18 05:02:47,649 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 05:02:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1196 transitions. [2022-01-18 05:02:47,650 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1196 transitions. Word has length 20 [2022-01-18 05:02:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:47,650 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1196 transitions. [2022-01-18 05:02:47,650 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 05:02:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1196 transitions. [2022-01-18 05:02:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:47,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:47,651 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 05:02:47,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:47,855 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 05:02:47,855 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1923875078, now seen corresponding path program 257 times [2022-01-18 05:02:47,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:47,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828948071] [2022-01-18 05:02:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:47,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:47,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828948071] [2022-01-18 05:02:47,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828948071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126605005] [2022-01-18 05:02:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:47,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:47,958 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 05:02:47,958 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 05:02:48,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:48,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:48,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:48,409 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 05:02:48,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:48,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:48,524 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 05:02:48,582 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 05:02:48,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126605005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:48,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:48,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:48,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251907633] [2022-01-18 05:02:48,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:48,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:48,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:48,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:48,583 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 05:02:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:49,074 INFO L93 Difference]: Finished difference Result 542 states and 1554 transitions. [2022-01-18 05:02:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:02:49,074 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 05:02:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:49,075 INFO L225 Difference]: With dead ends: 542 [2022-01-18 05:02:49,075 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 05:02:49,075 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 05:02:49,075 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 05:02:49,075 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 05:02:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 05:02:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 390. [2022-01-18 05:02:49,080 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 05:02:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1198 transitions. [2022-01-18 05:02:49,080 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1198 transitions. Word has length 20 [2022-01-18 05:02:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:49,080 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1198 transitions. [2022-01-18 05:02:49,080 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 05:02:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1198 transitions. [2022-01-18 05:02:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:49,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:49,081 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 05:02:49,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-01-18 05:02:49,281 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 05:02:49,281 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1782694978, now seen corresponding path program 258 times [2022-01-18 05:02:49,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102698657] [2022-01-18 05:02:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:49,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:49,388 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 05:02:49,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102698657] [2022-01-18 05:02:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102698657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38384738] [2022-01-18 05:02:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:49,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:49,389 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 05:02:49,389 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 05:02:49,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:02:49,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:49,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:49,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:49,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:49,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 05:02:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38384738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:50,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:50,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091343330] [2022-01-18 05:02:50,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:50,038 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 05:02:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:50,496 INFO L93 Difference]: Finished difference Result 533 states and 1540 transitions. [2022-01-18 05:02:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:50,496 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 05:02:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:50,497 INFO L225 Difference]: With dead ends: 533 [2022-01-18 05:02:50,497 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 05:02:50,497 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 05:02:50,497 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 05:02:50,498 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 05:02:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 05:02:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 383. [2022-01-18 05:02:50,501 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 05:02:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1180 transitions. [2022-01-18 05:02:50,502 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1180 transitions. Word has length 20 [2022-01-18 05:02:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:50,502 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1180 transitions. [2022-01-18 05:02:50,502 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 05:02:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1180 transitions. [2022-01-18 05:02:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:50,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:50,503 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:50,519 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 05:02:50,703 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 05:02:50,703 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1517896698, now seen corresponding path program 259 times [2022-01-18 05:02:50,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:50,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055820968] [2022-01-18 05:02:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:50,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:50,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055820968] [2022-01-18 05:02:50,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055820968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583343503] [2022-01-18 05:02:50,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:50,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:50,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:50,816 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 05:02:50,816 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 05:02:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:51,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:51,260 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 05:02:51,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:51,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:51,392 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 05:02:51,454 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 05:02:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583343503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:51,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:51,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:51,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952952679] [2022-01-18 05:02:51,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:51,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:51,455 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 05:02:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:51,777 INFO L93 Difference]: Finished difference Result 467 states and 1392 transitions. [2022-01-18 05:02:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:51,778 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 05:02:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:51,779 INFO L225 Difference]: With dead ends: 467 [2022-01-18 05:02:51,779 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 05:02:51,779 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 05:02:51,779 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 05:02:51,779 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 05:02:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 05:02:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 380. [2022-01-18 05:02:51,782 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 05:02:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1165 transitions. [2022-01-18 05:02:51,783 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1165 transitions. Word has length 20 [2022-01-18 05:02:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:51,783 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1165 transitions. [2022-01-18 05:02:51,783 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 05:02:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1165 transitions. [2022-01-18 05:02:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:51,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:51,784 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:51,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:51,984 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 05:02:51,984 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash -537443566, now seen corresponding path program 260 times [2022-01-18 05:02:51,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:51,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532540930] [2022-01-18 05:02:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:51,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:52,084 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 05:02:52,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:52,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532540930] [2022-01-18 05:02:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532540930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:52,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098653388] [2022-01-18 05:02:52,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:02:52,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:52,085 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 05:02:52,086 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 05:02:52,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:52,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:52,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:52,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:52,708 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 49 treesize of output 45 [2022-01-18 05:02:52,771 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 05:02:52,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098653388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:52,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:52,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:52,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244430470] [2022-01-18 05:02:52,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:52,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:52,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:52,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:52,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:52,772 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 05:02:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:53,368 INFO L93 Difference]: Finished difference Result 510 states and 1481 transitions. [2022-01-18 05:02:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:02:53,369 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 05:02:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:53,369 INFO L225 Difference]: With dead ends: 510 [2022-01-18 05:02:53,369 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 05:02:53,370 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 05:02:53,370 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 05:02:53,370 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 05:02:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 05:02:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 390. [2022-01-18 05:02:53,374 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 05:02:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1192 transitions. [2022-01-18 05:02:53,374 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1192 transitions. Word has length 20 [2022-01-18 05:02:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:53,374 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1192 transitions. [2022-01-18 05:02:53,374 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 05:02:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1192 transitions. [2022-01-18 05:02:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:53,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:53,375 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 05:02:53,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-18 05:02:53,575 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 05:02:53,575 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -513543652, now seen corresponding path program 261 times [2022-01-18 05:02:53,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976878890] [2022-01-18 05:02:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:53,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:53,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:53,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976878890] [2022-01-18 05:02:53,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976878890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:53,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583146461] [2022-01-18 05:02:53,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:02:53,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:53,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:53,768 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 05:02:53,769 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 05:02:53,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:02:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:02:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:54,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:54,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:54,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:54,495 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 114 treesize of output 100 [2022-01-18 05:02:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583146461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:54,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:54,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:02:54,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674940994] [2022-01-18 05:02:54,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:54,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:02:54,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:54,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:02:54,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:02:54,591 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 05:02:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:55,288 INFO L93 Difference]: Finished difference Result 520 states and 1517 transitions. [2022-01-18 05:02:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 05:02:55,288 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 05:02:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:55,289 INFO L225 Difference]: With dead ends: 520 [2022-01-18 05:02:55,289 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 05:02:55,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 05:02:55,289 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 05:02:55,290 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 05:02:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 05:02:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 379. [2022-01-18 05:02:55,293 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 05:02:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1160 transitions. [2022-01-18 05:02:55,294 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1160 transitions. Word has length 20 [2022-01-18 05:02:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:55,294 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1160 transitions. [2022-01-18 05:02:55,294 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 05:02:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1160 transitions. [2022-01-18 05:02:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:55,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:55,294 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 05:02:55,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-01-18 05:02:55,495 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 05:02:55,495 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash 904197766, now seen corresponding path program 262 times [2022-01-18 05:02:55,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:55,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713963157] [2022-01-18 05:02:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:55,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:55,590 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 05:02:55,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713963157] [2022-01-18 05:02:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713963157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475571858] [2022-01-18 05:02:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:02:55,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:55,591 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 05:02:55,591 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 05:02:55,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:02:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:55,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:55,989 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 05:02:55,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:56,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:56,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:56,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475571858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:56,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:56,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:56,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930302396] [2022-01-18 05:02:56,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:56,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:56,160 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 05:02:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:56,593 INFO L93 Difference]: Finished difference Result 413 states and 1244 transitions. [2022-01-18 05:02:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:56,593 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 05:02:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:56,594 INFO L225 Difference]: With dead ends: 413 [2022-01-18 05:02:56,594 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 05:02:56,594 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 05:02:56,594 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 05:02:56,594 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 05:02:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 05:02:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 381. [2022-01-18 05:02:56,598 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 05:02:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1165 transitions. [2022-01-18 05:02:56,598 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1165 transitions. Word has length 20 [2022-01-18 05:02:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:56,598 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1165 transitions. [2022-01-18 05:02:56,598 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 05:02:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1165 transitions. [2022-01-18 05:02:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:56,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:56,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:56,615 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 05:02:56,799 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 05:02:56,799 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1645095100, now seen corresponding path program 263 times [2022-01-18 05:02:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840054126] [2022-01-18 05:02:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:56,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:56,903 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 05:02:56,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840054126] [2022-01-18 05:02:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840054126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266512124] [2022-01-18 05:02:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:02:56,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:56,905 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 05:02:56,905 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 05:02:57,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:02:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:57,246 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 75 treesize of output 59 [2022-01-18 05:02:57,321 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 05:02:57,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:57,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:57,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:02:57,489 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 05:02:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266512124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:57,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:57,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:02:57,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496062389] [2022-01-18 05:02:57,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:57,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:02:57,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:02:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:02:57,490 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 05:02:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:58,007 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2022-01-18 05:02:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:02:58,007 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 05:02:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:58,008 INFO L225 Difference]: With dead ends: 438 [2022-01-18 05:02:58,008 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 05:02:58,008 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 05:02:58,008 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 05:02:58,008 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 05:02:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 05:02:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 391. [2022-01-18 05:02:58,012 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 05:02:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1192 transitions. [2022-01-18 05:02:58,012 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1192 transitions. Word has length 20 [2022-01-18 05:02:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1192 transitions. [2022-01-18 05:02:58,013 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 05:02:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1192 transitions. [2022-01-18 05:02:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:58,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:58,013 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 05:02:58,029 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 05:02:58,213 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 05:02:58,213 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1668995014, now seen corresponding path program 264 times [2022-01-18 05:02:58,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:58,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662086700] [2022-01-18 05:02:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:58,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:58,324 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 05:02:58,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662086700] [2022-01-18 05:02:58,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662086700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371251172] [2022-01-18 05:02:58,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:02:58,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:58,325 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 05:02:58,326 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 05:02:58,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:02:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:02:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:58,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:58,750 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 05:02:58,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:02:58,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:02:58,869 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 45 [2022-01-18 05:02:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371251172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:02:58,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:02:58,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:02:58,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618432560] [2022-01-18 05:02:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:02:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:02:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:02:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:02:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:02:58,936 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 05:02:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:02:59,300 INFO L93 Difference]: Finished difference Result 409 states and 1242 transitions. [2022-01-18 05:02:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:02:59,301 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 05:02:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:02:59,301 INFO L225 Difference]: With dead ends: 409 [2022-01-18 05:02:59,301 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 05:02:59,302 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 05:02:59,302 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 05:02:59,302 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 05:02:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 05:02:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 376. [2022-01-18 05:02:59,305 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 05:02:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1147 transitions. [2022-01-18 05:02:59,306 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1147 transitions. Word has length 20 [2022-01-18 05:02:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:02:59,306 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1147 transitions. [2022-01-18 05:02:59,306 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 05:02:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1147 transitions. [2022-01-18 05:02:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:02:59,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:02:59,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:02:59,322 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 05:02:59,506 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 05:02:59,507 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:02:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:02:59,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1682460558, now seen corresponding path program 265 times [2022-01-18 05:02:59,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:02:59,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516107659] [2022-01-18 05:02:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:02:59,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:02:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:59,580 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 05:02:59,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:02:59,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516107659] [2022-01-18 05:02:59,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516107659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:02:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196051003] [2022-01-18 05:02:59,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:02:59,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:02:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:02:59,582 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 05:02:59,582 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 05:02:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:02:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:02:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:02:59,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:02:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:02:59,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:00,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:00,030 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 27 treesize of output 27 [2022-01-18 05:03:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:00,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196051003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:00,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:00,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:03:00,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822415274] [2022-01-18 05:03:00,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:00,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:03:00,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:00,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:03:00,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:03:00,052 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 05:03:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:00,277 INFO L93 Difference]: Finished difference Result 605 states and 1760 transitions. [2022-01-18 05:03:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:00,277 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 05:03:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:00,278 INFO L225 Difference]: With dead ends: 605 [2022-01-18 05:03:00,278 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 05:03:00,278 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 05:03:00,278 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 05:03:00,278 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 05:03:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 05:03:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 394. [2022-01-18 05:03:00,282 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 05:03:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1219 transitions. [2022-01-18 05:03:00,283 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1219 transitions. Word has length 20 [2022-01-18 05:03:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:00,283 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1219 transitions. [2022-01-18 05:03:00,283 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 05:03:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1219 transitions. [2022-01-18 05:03:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:00,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:00,283 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 05:03:00,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:00,483 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 05:03:00,484 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2074651160, now seen corresponding path program 266 times [2022-01-18 05:03:00,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681555187] [2022-01-18 05:03:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:00,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:00,559 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 05:03:00,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681555187] [2022-01-18 05:03:00,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681555187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:00,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378923298] [2022-01-18 05:03:00,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:00,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:00,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:00,560 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 05:03:00,560 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 05:03:00,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:00,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:00,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:00,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:01,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:01,015 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 27 treesize of output 27 [2022-01-18 05:03:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:01,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378923298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:01,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:01,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:01,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314678725] [2022-01-18 05:03:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:01,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:01,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:01,038 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 05:03:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:01,322 INFO L93 Difference]: Finished difference Result 616 states and 1787 transitions. [2022-01-18 05:03:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:01,323 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 05:03:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:01,323 INFO L225 Difference]: With dead ends: 616 [2022-01-18 05:03:01,324 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 05:03:01,324 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 05:03:01,324 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 05:03:01,324 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 05:03:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 05:03:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 400. [2022-01-18 05:03:01,328 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 05:03:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1244 transitions. [2022-01-18 05:03:01,329 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1244 transitions. Word has length 20 [2022-01-18 05:03:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:01,329 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1244 transitions. [2022-01-18 05:03:01,329 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 05:03:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1244 transitions. [2022-01-18 05:03:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:01,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:01,329 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 05:03:01,345 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 05:03:01,539 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 05:03:01,539 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:01,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1192573726, now seen corresponding path program 267 times [2022-01-18 05:03:01,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:01,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571896606] [2022-01-18 05:03:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:01,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:01,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571896606] [2022-01-18 05:03:01,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571896606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567959520] [2022-01-18 05:03:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:01,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:01,613 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 05:03:01,613 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 05:03:01,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:01,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:01,930 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 05:03:01,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:02,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:02,036 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 27 treesize of output 27 [2022-01-18 05:03:02,058 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 05:03:02,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567959520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:02,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:02,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:03:02,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067204660] [2022-01-18 05:03:02,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:02,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:03:02,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:02,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:03:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:03:02,059 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 05:03:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:02,300 INFO L93 Difference]: Finished difference Result 573 states and 1678 transitions. [2022-01-18 05:03:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:02,300 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 05:03:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:02,301 INFO L225 Difference]: With dead ends: 573 [2022-01-18 05:03:02,301 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 05:03:02,301 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 05:03:02,301 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 05:03:02,301 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 05:03:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 05:03:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 398. [2022-01-18 05:03:02,305 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 05:03:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1233 transitions. [2022-01-18 05:03:02,306 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1233 transitions. Word has length 20 [2022-01-18 05:03:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:02,306 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1233 transitions. [2022-01-18 05:03:02,306 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 05:03:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1233 transitions. [2022-01-18 05:03:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:02,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:02,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:02,323 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 05:03:02,513 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 05:03:02,514 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash -239316843, now seen corresponding path program 268 times [2022-01-18 05:03:02,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416867265] [2022-01-18 05:03:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:02,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:02,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416867265] [2022-01-18 05:03:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416867265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239488342] [2022-01-18 05:03:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:02,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:02,573 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 05:03:02,573 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 05:03:02,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:02,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:02,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:02,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:03,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:03,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:03,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239488342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:03,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:03,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 05:03:03,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034338702] [2022-01-18 05:03:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:03,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:03:03,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:03:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:03:03,150 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 05:03:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:03,680 INFO L93 Difference]: Finished difference Result 758 states and 2125 transitions. [2022-01-18 05:03:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:03:03,680 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 05:03:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:03,681 INFO L225 Difference]: With dead ends: 758 [2022-01-18 05:03:03,681 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 05:03:03,682 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 05:03:03,682 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 05:03:03,682 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 05:03:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 05:03:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 394. [2022-01-18 05:03:03,686 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 05:03:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1213 transitions. [2022-01-18 05:03:03,686 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1213 transitions. Word has length 20 [2022-01-18 05:03:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:03,687 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1213 transitions. [2022-01-18 05:03:03,687 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 05:03:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1213 transitions. [2022-01-18 05:03:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:03,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:03,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:03,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:03,887 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 05:03:03,888 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1119525864, now seen corresponding path program 269 times [2022-01-18 05:03:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:03,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464723312] [2022-01-18 05:03:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:03,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:03,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464723312] [2022-01-18 05:03:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464723312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800427053] [2022-01-18 05:03:03,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:03,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:03,965 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 05:03:03,965 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 05:03:04,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:04,181 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 05:03:04,280 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 05:03:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:04,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:04,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:04,429 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 05:03:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800427053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:04,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:04,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:04,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626576035] [2022-01-18 05:03:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:04,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:04,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:04,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:04,430 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 05:03:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:04,683 INFO L93 Difference]: Finished difference Result 690 states and 1994 transitions. [2022-01-18 05:03:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:04,683 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 05:03:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:04,684 INFO L225 Difference]: With dead ends: 690 [2022-01-18 05:03:04,684 INFO L226 Difference]: Without dead ends: 690 [2022-01-18 05:03:04,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:03:04,684 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 05:03:04,684 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 05:03:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-18 05:03:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 389. [2022-01-18 05:03:04,689 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 05:03:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1195 transitions. [2022-01-18 05:03:04,689 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1195 transitions. Word has length 20 [2022-01-18 05:03:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1195 transitions. [2022-01-18 05:03:04,689 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 05:03:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1195 transitions. [2022-01-18 05:03:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:04,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:04,690 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 05:03:04,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:04,890 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 05:03:04,890 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1395393816, now seen corresponding path program 270 times [2022-01-18 05:03:04,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886830180] [2022-01-18 05:03:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:04,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:04,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886830180] [2022-01-18 05:03:04,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886830180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464367142] [2022-01-18 05:03:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:04,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:04,978 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 05:03:04,978 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 05:03:05,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:05,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:05,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:05,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:05,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:05,516 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 05:03:05,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464367142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:05,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:05,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:05,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692607429] [2022-01-18 05:03:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:05,517 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 05:03:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:05,813 INFO L93 Difference]: Finished difference Result 650 states and 1884 transitions. [2022-01-18 05:03:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:05,814 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 05:03:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:05,814 INFO L225 Difference]: With dead ends: 650 [2022-01-18 05:03:05,814 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 05:03:05,815 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 05:03:05,815 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 05:03:05,815 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 05:03:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 05:03:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 396. [2022-01-18 05:03:05,819 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 05:03:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1224 transitions. [2022-01-18 05:03:05,820 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1224 transitions. Word has length 20 [2022-01-18 05:03:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:05,820 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1224 transitions. [2022-01-18 05:03:05,820 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 05:03:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1224 transitions. [2022-01-18 05:03:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:05,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:05,820 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 05:03:05,836 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 05:03:06,021 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 05:03:06,021 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash -121238962, now seen corresponding path program 271 times [2022-01-18 05:03:06,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844891386] [2022-01-18 05:03:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:06,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:06,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844891386] [2022-01-18 05:03:06,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844891386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160481478] [2022-01-18 05:03:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:06,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:06,116 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 05:03:06,117 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 05:03:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:06,330 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 05:03:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:06,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:06,593 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 27 treesize of output 27 [2022-01-18 05:03:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:06,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160481478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:06,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:06,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:06,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167469639] [2022-01-18 05:03:06,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:06,616 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 05:03:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:06,868 INFO L93 Difference]: Finished difference Result 617 states and 1807 transitions. [2022-01-18 05:03:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:06,868 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 05:03:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:06,869 INFO L225 Difference]: With dead ends: 617 [2022-01-18 05:03:06,869 INFO L226 Difference]: Without dead ends: 617 [2022-01-18 05:03:06,869 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 05:03:06,869 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 05:03:06,869 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 05:03:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-18 05:03:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 387. [2022-01-18 05:03:06,873 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 05:03:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1185 transitions. [2022-01-18 05:03:06,874 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1185 transitions. Word has length 20 [2022-01-18 05:03:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:06,874 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1185 transitions. [2022-01-18 05:03:06,874 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 05:03:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1185 transitions. [2022-01-18 05:03:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:06,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:06,875 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 05:03:06,891 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 05:03:07,075 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 05:03:07,075 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2089839597, now seen corresponding path program 272 times [2022-01-18 05:03:07,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550236340] [2022-01-18 05:03:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:07,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:07,127 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 05:03:07,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550236340] [2022-01-18 05:03:07,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550236340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206374875] [2022-01-18 05:03:07,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:07,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:07,128 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 05:03:07,129 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 05:03:07,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:07,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:07,475 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 05:03:07,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:07,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:07,565 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 49 treesize of output 45 [2022-01-18 05:03:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:07,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206374875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:07,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:07,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:03:07,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644977796] [2022-01-18 05:03:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:07,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:03:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:03:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:03:07,633 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 05:03:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:08,034 INFO L93 Difference]: Finished difference Result 598 states and 1712 transitions. [2022-01-18 05:03:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:08,034 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 05:03:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:08,035 INFO L225 Difference]: With dead ends: 598 [2022-01-18 05:03:08,035 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 05:03:08,035 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 05:03:08,036 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 05:03:08,036 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 05:03:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 05:03:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 384. [2022-01-18 05:03:08,040 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 05:03:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1168 transitions. [2022-01-18 05:03:08,041 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1168 transitions. Word has length 20 [2022-01-18 05:03:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:08,041 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1168 transitions. [2022-01-18 05:03:08,041 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 05:03:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1168 transitions. [2022-01-18 05:03:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:08,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:08,041 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:08,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:08,242 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 05:03:08,242 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash -872338792, now seen corresponding path program 273 times [2022-01-18 05:03:08,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:08,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875522237] [2022-01-18 05:03:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:08,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:08,329 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 05:03:08,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:08,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875522237] [2022-01-18 05:03:08,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875522237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:08,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465204762] [2022-01-18 05:03:08,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:08,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:08,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:08,330 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 05:03:08,330 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 05:03:08,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:08,549 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 54 treesize of output 42 [2022-01-18 05:03:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:08,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:08,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:08,832 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 27 treesize of output 27 [2022-01-18 05:03:08,854 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 05:03:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465204762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:08,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:08,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466308854] [2022-01-18 05:03:08,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:08,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:08,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:08,855 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 05:03:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:09,219 INFO L93 Difference]: Finished difference Result 728 states and 2045 transitions. [2022-01-18 05:03:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:09,220 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 05:03:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:09,221 INFO L225 Difference]: With dead ends: 728 [2022-01-18 05:03:09,221 INFO L226 Difference]: Without dead ends: 728 [2022-01-18 05:03:09,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:03:09,221 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 05:03:09,221 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 05:03:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-18 05:03:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 392. [2022-01-18 05:03:09,226 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 05:03:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1204 transitions. [2022-01-18 05:03:09,226 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1204 transitions. Word has length 20 [2022-01-18 05:03:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:09,226 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1204 transitions. [2022-01-18 05:03:09,226 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 05:03:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1204 transitions. [2022-01-18 05:03:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:09,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:09,227 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 05:03:09,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 05:03:09,427 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 05:03:09,427 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 9738642, now seen corresponding path program 274 times [2022-01-18 05:03:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428782372] [2022-01-18 05:03:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:09,511 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 05:03:09,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428782372] [2022-01-18 05:03:09,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428782372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718543044] [2022-01-18 05:03:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:09,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:09,513 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 05:03:09,513 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 05:03:09,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:09,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:09,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:10,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:10,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:10,025 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 05:03:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718543044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:10,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:10,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:10,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636276081] [2022-01-18 05:03:10,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:10,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:10,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:10,026 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 05:03:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:10,265 INFO L93 Difference]: Finished difference Result 662 states and 1891 transitions. [2022-01-18 05:03:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:10,265 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 05:03:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:10,266 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:03:10,266 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 05:03:10,266 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 05:03:10,266 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 05:03:10,266 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 05:03:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 05:03:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 386. [2022-01-18 05:03:10,271 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 05:03:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1179 transitions. [2022-01-18 05:03:10,272 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1179 transitions. Word has length 20 [2022-01-18 05:03:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:10,272 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1179 transitions. [2022-01-18 05:03:10,272 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 05:03:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1179 transitions. [2022-01-18 05:03:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:10,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:10,272 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 05:03:10,289 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 05:03:10,473 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 05:03:10,473 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:10,473 INFO L85 PathProgramCache]: Analyzing trace with hash -131441458, now seen corresponding path program 275 times [2022-01-18 05:03:10,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:10,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508358158] [2022-01-18 05:03:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:10,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:10,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508358158] [2022-01-18 05:03:10,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508358158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668843219] [2022-01-18 05:03:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:10,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:10,569 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 05:03:10,569 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 05:03:10,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:10,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:10,786 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 05:03:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:10,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:11,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:11,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:11,092 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 05:03:11,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668843219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:11,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:11,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:11,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758731420] [2022-01-18 05:03:11,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:11,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:11,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:11,093 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 05:03:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:11,367 INFO L93 Difference]: Finished difference Result 687 states and 1980 transitions. [2022-01-18 05:03:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:11,367 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 05:03:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:11,368 INFO L225 Difference]: With dead ends: 687 [2022-01-18 05:03:11,368 INFO L226 Difference]: Without dead ends: 687 [2022-01-18 05:03:11,368 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 05:03:11,368 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 05:03:11,368 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 05:03:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-18 05:03:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 389. [2022-01-18 05:03:11,373 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 05:03:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1194 transitions. [2022-01-18 05:03:11,373 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1194 transitions. Word has length 20 [2022-01-18 05:03:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1194 transitions. [2022-01-18 05:03:11,373 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 05:03:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1194 transitions. [2022-01-18 05:03:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:11,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:11,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:11,390 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 05:03:11,574 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 05:03:11,574 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 862934162, now seen corresponding path program 276 times [2022-01-18 05:03:11,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:11,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096597532] [2022-01-18 05:03:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:11,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:11,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096597532] [2022-01-18 05:03:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096597532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152475697] [2022-01-18 05:03:11,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:11,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:11,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:11,670 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 05:03:11,671 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 05:03:11,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:11,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:11,891 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 54 treesize of output 42 [2022-01-18 05:03:12,027 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 05:03:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:12,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:12,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:12,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152475697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:12,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:12,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:12,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402590226] [2022-01-18 05:03:12,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:12,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:12,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:12,203 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 05:03:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:12,460 INFO L93 Difference]: Finished difference Result 656 states and 1913 transitions. [2022-01-18 05:03:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:12,460 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 05:03:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:12,461 INFO L225 Difference]: With dead ends: 656 [2022-01-18 05:03:12,461 INFO L226 Difference]: Without dead ends: 656 [2022-01-18 05:03:12,461 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 05:03:12,461 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 05:03:12,461 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 05:03:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-18 05:03:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 386. [2022-01-18 05:03:12,466 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 05:03:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1179 transitions. [2022-01-18 05:03:12,466 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1179 transitions. Word has length 20 [2022-01-18 05:03:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:12,466 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1179 transitions. [2022-01-18 05:03:12,467 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 05:03:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1179 transitions. [2022-01-18 05:03:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:12,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:12,467 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:12,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:12,667 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 05:03:12,668 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1843387294, now seen corresponding path program 277 times [2022-01-18 05:03:12,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:12,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284753708] [2022-01-18 05:03:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:12,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:12,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284753708] [2022-01-18 05:03:12,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284753708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:12,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183026628] [2022-01-18 05:03:12,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:12,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:12,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:12,770 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 05:03:12,771 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 05:03:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:12,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:12,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:13,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:13,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183026628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:13,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:13,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:13,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292630133] [2022-01-18 05:03:13,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:13,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:13,250 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 05:03:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:13,469 INFO L93 Difference]: Finished difference Result 610 states and 1760 transitions. [2022-01-18 05:03:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:13,470 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 05:03:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:13,471 INFO L225 Difference]: With dead ends: 610 [2022-01-18 05:03:13,471 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 05:03:13,471 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 05:03:13,471 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 05:03:13,471 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 05:03:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 05:03:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 390. [2022-01-18 05:03:13,475 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 05:03:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1193 transitions. [2022-01-18 05:03:13,476 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1193 transitions. Word has length 20 [2022-01-18 05:03:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:13,476 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1193 transitions. [2022-01-18 05:03:13,476 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 05:03:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1193 transitions. [2022-01-18 05:03:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:13,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:13,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:13,493 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 05:03:13,677 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 05:03:13,677 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1867287208, now seen corresponding path program 278 times [2022-01-18 05:03:13,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:13,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952089012] [2022-01-18 05:03:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:13,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:13,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952089012] [2022-01-18 05:03:13,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952089012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394151302] [2022-01-18 05:03:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:13,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:13,775 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 05:03:13,775 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 05:03:13,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:13,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:14,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:14,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:14,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:14,275 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 05:03:14,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394151302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:14,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:14,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:14,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286358726] [2022-01-18 05:03:14,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:14,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:14,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:14,276 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 05:03:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:14,543 INFO L93 Difference]: Finished difference Result 616 states and 1781 transitions. [2022-01-18 05:03:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:14,544 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 05:03:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:14,545 INFO L225 Difference]: With dead ends: 616 [2022-01-18 05:03:14,545 INFO L226 Difference]: Without dead ends: 616 [2022-01-18 05:03:14,545 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 05:03:14,545 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 05:03:14,545 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 05:03:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-18 05:03:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 385. [2022-01-18 05:03:14,549 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 05:03:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2022-01-18 05:03:14,550 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 20 [2022-01-18 05:03:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2022-01-18 05:03:14,550 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 05:03:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2022-01-18 05:03:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:14,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:14,550 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 05:03:14,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:14,750 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 05:03:14,751 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:14,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1051948166, now seen corresponding path program 279 times [2022-01-18 05:03:14,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:14,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650404148] [2022-01-18 05:03:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:14,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:14,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:14,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650404148] [2022-01-18 05:03:14,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650404148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:14,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633458405] [2022-01-18 05:03:14,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:14,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:14,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:14,834 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 05:03:14,835 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 05:03:14,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:14,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:15,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:15,129 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 05:03:15,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:15,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:15,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633458405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:15,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:15,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:15,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056316506] [2022-01-18 05:03:15,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:15,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:15,274 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 05:03:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:15,528 INFO L93 Difference]: Finished difference Result 534 states and 1588 transitions. [2022-01-18 05:03:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:15,529 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 05:03:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:15,529 INFO L225 Difference]: With dead ends: 534 [2022-01-18 05:03:15,529 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 05:03:15,530 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 05:03:15,530 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 05:03:15,530 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 05:03:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 05:03:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 378. [2022-01-18 05:03:15,533 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 05:03:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1149 transitions. [2022-01-18 05:03:15,534 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1149 transitions. Word has length 20 [2022-01-18 05:03:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1149 transitions. [2022-01-18 05:03:15,534 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 05:03:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1149 transitions. [2022-01-18 05:03:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:15,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:15,535 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 05:03:15,551 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 05:03:15,735 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 05:03:15,735 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2031860670, now seen corresponding path program 280 times [2022-01-18 05:03:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87873436] [2022-01-18 05:03:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:15,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:15,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87873436] [2022-01-18 05:03:15,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87873436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879111347] [2022-01-18 05:03:15,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:15,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:15,812 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 05:03:15,812 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 05:03:15,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:16,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:16,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:16,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:16,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:16,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879111347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:16,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:16,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:16,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901812000] [2022-01-18 05:03:16,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:16,294 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 05:03:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:16,533 INFO L93 Difference]: Finished difference Result 528 states and 1548 transitions. [2022-01-18 05:03:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:16,533 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 05:03:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:16,534 INFO L225 Difference]: With dead ends: 528 [2022-01-18 05:03:16,534 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 05:03:16,534 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 05:03:16,535 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 05:03:16,535 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 05:03:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 05:03:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 385. [2022-01-18 05:03:16,539 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 05:03:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1168 transitions. [2022-01-18 05:03:16,539 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1168 transitions. Word has length 20 [2022-01-18 05:03:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:16,539 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1168 transitions. [2022-01-18 05:03:16,539 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 05:03:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1168 transitions. [2022-01-18 05:03:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:16,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:16,540 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:16,556 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 05:03:16,740 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 05:03:16,740 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -757705816, now seen corresponding path program 281 times [2022-01-18 05:03:16,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:16,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673206196] [2022-01-18 05:03:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:16,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:16,847 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 05:03:16,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:16,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673206196] [2022-01-18 05:03:16,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673206196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:16,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950819222] [2022-01-18 05:03:16,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:16,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:16,848 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 05:03:16,849 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 05:03:17,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:17,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:03:17,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:03:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:17,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:17,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:17,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950819222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:17,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485240378] [2022-01-18 05:03:17,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:17,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:17,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:17,373 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 05:03:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:17,562 INFO L93 Difference]: Finished difference Result 505 states and 1523 transitions. [2022-01-18 05:03:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:17,562 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 05:03:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:17,563 INFO L225 Difference]: With dead ends: 505 [2022-01-18 05:03:17,563 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 05:03:17,563 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 05:03:17,563 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 05:03:17,563 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 05:03:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 05:03:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 385. [2022-01-18 05:03:17,567 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 05:03:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1167 transitions. [2022-01-18 05:03:17,567 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1167 transitions. Word has length 20 [2022-01-18 05:03:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:17,567 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1167 transitions. [2022-01-18 05:03:17,568 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 05:03:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1167 transitions. [2022-01-18 05:03:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:17,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:17,568 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 05:03:17,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:17,768 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 05:03:17,769 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1847318576, now seen corresponding path program 282 times [2022-01-18 05:03:17,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631326700] [2022-01-18 05:03:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:17,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:17,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631326700] [2022-01-18 05:03:17,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631326700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670545439] [2022-01-18 05:03:17,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:17,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:17,852 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 05:03:17,853 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 05:03:18,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:18,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:18,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:18,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:18,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:18,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:18,325 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 05:03:18,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670545439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:18,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:18,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:18,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441471898] [2022-01-18 05:03:18,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:18,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:18,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:18,326 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 05:03:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:18,579 INFO L93 Difference]: Finished difference Result 485 states and 1450 transitions. [2022-01-18 05:03:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:18,579 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 05:03:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:18,580 INFO L225 Difference]: With dead ends: 485 [2022-01-18 05:03:18,580 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 05:03:18,580 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 05:03:18,580 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 05:03:18,580 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 05:03:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 05:03:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 368. [2022-01-18 05:03:18,583 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 05:03:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1107 transitions. [2022-01-18 05:03:18,584 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1107 transitions. Word has length 20 [2022-01-18 05:03:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:18,584 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1107 transitions. [2022-01-18 05:03:18,584 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 05:03:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1107 transitions. [2022-01-18 05:03:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:18,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:18,585 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 05:03:18,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:18,785 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 05:03:18,785 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash 600706988, now seen corresponding path program 283 times [2022-01-18 05:03:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:18,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811005042] [2022-01-18 05:03:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:18,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:18,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:18,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811005042] [2022-01-18 05:03:18,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811005042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678962610] [2022-01-18 05:03:18,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:18,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:18,862 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 05:03:18,867 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 05:03:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:19,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:19,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:19,182 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 05:03:19,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:19,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:19,342 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 05:03:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:19,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678962610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:19,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:19,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:19,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380114840] [2022-01-18 05:03:19,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:19,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:19,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:19,365 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 05:03:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:19,625 INFO L93 Difference]: Finished difference Result 438 states and 1293 transitions. [2022-01-18 05:03:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:19,625 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 05:03:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:19,626 INFO L225 Difference]: With dead ends: 438 [2022-01-18 05:03:19,626 INFO L226 Difference]: Without dead ends: 438 [2022-01-18 05:03:19,626 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 05:03:19,626 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 05:03:19,626 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 05:03:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-18 05:03:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 374. [2022-01-18 05:03:19,629 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 05:03:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1134 transitions. [2022-01-18 05:03:19,630 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1134 transitions. Word has length 20 [2022-01-18 05:03:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:19,630 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1134 transitions. [2022-01-18 05:03:19,630 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 05:03:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1134 transitions. [2022-01-18 05:03:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:19,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:19,631 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:19,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-18 05:03:19,831 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 05:03:19,831 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1874861842, now seen corresponding path program 284 times [2022-01-18 05:03:19,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:19,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104744528] [2022-01-18 05:03:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:19,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:19,908 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 05:03:19,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104744528] [2022-01-18 05:03:19,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104744528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454658589] [2022-01-18 05:03:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:19,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:19,909 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 05:03:19,909 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 05:03:20,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:20,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:20,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:20,179 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 27 treesize of output 21 [2022-01-18 05:03:20,222 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 05:03:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:20,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:20,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:20,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454658589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:20,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:20,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:20,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642791844] [2022-01-18 05:03:20,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:20,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:20,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:20,399 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 05:03:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:20,700 INFO L93 Difference]: Finished difference Result 444 states and 1308 transitions. [2022-01-18 05:03:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:20,700 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 05:03:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:20,700 INFO L225 Difference]: With dead ends: 444 [2022-01-18 05:03:20,701 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 05:03:20,701 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 05:03:20,701 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 05:03:20,701 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 05:03:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 05:03:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2022-01-18 05:03:20,704 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 05:03:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1119 transitions. [2022-01-18 05:03:20,705 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1119 transitions. Word has length 20 [2022-01-18 05:03:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:20,705 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1119 transitions. [2022-01-18 05:03:20,705 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 05:03:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1119 transitions. [2022-01-18 05:03:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:20,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:20,706 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 05:03:20,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 05:03:20,906 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 05:03:20,906 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1877487618, now seen corresponding path program 285 times [2022-01-18 05:03:20,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475535361] [2022-01-18 05:03:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:20,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:20,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:20,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475535361] [2022-01-18 05:03:20,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475535361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:20,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600374362] [2022-01-18 05:03:20,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:20,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:20,975 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 05:03:20,976 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 05:03:21,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:03:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:21,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:21,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:21,419 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 27 treesize of output 27 [2022-01-18 05:03:21,441 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 05:03:21,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600374362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:21,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:21,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:21,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901621667] [2022-01-18 05:03:21,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:21,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:21,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:21,442 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 05:03:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:21,639 INFO L93 Difference]: Finished difference Result 402 states and 1201 transitions. [2022-01-18 05:03:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:21,640 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 05:03:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:21,641 INFO L225 Difference]: With dead ends: 402 [2022-01-18 05:03:21,641 INFO L226 Difference]: Without dead ends: 402 [2022-01-18 05:03:21,641 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 05:03:21,641 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 05:03:21,641 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 05:03:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-18 05:03:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 362. [2022-01-18 05:03:21,644 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 05:03:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1089 transitions. [2022-01-18 05:03:21,645 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1089 transitions. Word has length 20 [2022-01-18 05:03:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:21,645 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1089 transitions. [2022-01-18 05:03:21,645 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 05:03:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1089 transitions. [2022-01-18 05:03:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:21,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:21,645 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 05:03:21,662 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 05:03:21,846 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 05:03:21,846 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1241217125, now seen corresponding path program 286 times [2022-01-18 05:03:21,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996994837] [2022-01-18 05:03:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:21,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:21,906 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 05:03:21,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:21,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996994837] [2022-01-18 05:03:21,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996994837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:21,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607081990] [2022-01-18 05:03:21,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:21,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:21,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:21,907 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 05:03:21,908 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 05:03:22,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:22,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:22,236 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 05:03:22,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:22,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:22,317 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 49 treesize of output 45 [2022-01-18 05:03:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607081990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:22,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:22,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:03:22,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625579013] [2022-01-18 05:03:22,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:22,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:03:22,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:22,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:03:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:03:22,379 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 05:03:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:22,623 INFO L93 Difference]: Finished difference Result 460 states and 1331 transitions. [2022-01-18 05:03:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:22,623 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 05:03:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:22,624 INFO L225 Difference]: With dead ends: 460 [2022-01-18 05:03:22,624 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 05:03:22,624 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 05:03:22,624 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 05:03:22,624 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 05:03:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 05:03:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 356. [2022-01-18 05:03:22,627 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 05:03:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1066 transitions. [2022-01-18 05:03:22,628 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1066 transitions. Word has length 20 [2022-01-18 05:03:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:22,628 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1066 transitions. [2022-01-18 05:03:22,628 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 05:03:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1066 transitions. [2022-01-18 05:03:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:22,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:22,628 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 05:03:22,647 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 05:03:22,828 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 05:03:22,829 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2145272500, now seen corresponding path program 287 times [2022-01-18 05:03:22,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:22,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630140377] [2022-01-18 05:03:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:22,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:22,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630140377] [2022-01-18 05:03:22,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630140377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368189325] [2022-01-18 05:03:22,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:22,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:22,917 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 05:03:22,918 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 05:03:23,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:23,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:23,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:23,272 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 05:03:23,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:23,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:23,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:23,463 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 05:03:23,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368189325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:23,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:23,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:23,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008742186] [2022-01-18 05:03:23,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:23,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:23,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:23,464 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 05:03:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:23,801 INFO L93 Difference]: Finished difference Result 566 states and 1601 transitions. [2022-01-18 05:03:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:23,801 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 05:03:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:23,802 INFO L225 Difference]: With dead ends: 566 [2022-01-18 05:03:23,802 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 05:03:23,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:03:23,802 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 05:03:23,802 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 05:03:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 05:03:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 366. [2022-01-18 05:03:23,806 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 05:03:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1111 transitions. [2022-01-18 05:03:23,807 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1111 transitions. Word has length 20 [2022-01-18 05:03:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:23,807 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1111 transitions. [2022-01-18 05:03:23,807 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 05:03:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1111 transitions. [2022-01-18 05:03:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:23,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:23,807 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 05:03:23,824 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 05:03:24,008 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 05:03:24,008 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1263195066, now seen corresponding path program 288 times [2022-01-18 05:03:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473732911] [2022-01-18 05:03:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:24,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:24,091 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 05:03:24,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:24,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473732911] [2022-01-18 05:03:24,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473732911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:24,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559128326] [2022-01-18 05:03:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:24,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:24,092 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 05:03:24,092 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 05:03:24,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:03:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:24,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:24,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:24,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:24,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:24,644 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 05:03:24,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559128326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:24,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:24,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:24,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450948474] [2022-01-18 05:03:24,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:24,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:24,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:24,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:24,645 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 05:03:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:24,869 INFO L93 Difference]: Finished difference Result 500 states and 1447 transitions. [2022-01-18 05:03:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:24,869 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 05:03:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:24,870 INFO L225 Difference]: With dead ends: 500 [2022-01-18 05:03:24,870 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 05:03:24,870 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 05:03:24,870 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 05:03:24,870 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 05:03:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 05:03:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 369. [2022-01-18 05:03:24,874 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 05:03:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1113 transitions. [2022-01-18 05:03:24,874 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1113 transitions. Word has length 20 [2022-01-18 05:03:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:24,874 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1113 transitions. [2022-01-18 05:03:24,874 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 05:03:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1113 transitions. [2022-01-18 05:03:24,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:24,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:24,875 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 05:03:24,891 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 05:03:25,075 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 05:03:25,075 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1404375166, now seen corresponding path program 289 times [2022-01-18 05:03:25,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368244841] [2022-01-18 05:03:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:25,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:25,176 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 05:03:25,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:25,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368244841] [2022-01-18 05:03:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368244841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243591910] [2022-01-18 05:03:25,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:25,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:25,177 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 05:03:25,178 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 05:03:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:25,453 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 63 treesize of output 49 [2022-01-18 05:03:25,550 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 05:03:25,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:25,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:25,708 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 05:03:25,731 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 05:03:25,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243591910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:25,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:25,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:25,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11014920] [2022-01-18 05:03:25,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:25,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:25,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:25,732 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 05:03:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:26,053 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2022-01-18 05:03:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:26,053 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 05:03:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:26,054 INFO L225 Difference]: With dead ends: 571 [2022-01-18 05:03:26,054 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 05:03:26,054 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 05:03:26,055 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 05:03:26,055 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 05:03:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 05:03:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 372. [2022-01-18 05:03:26,059 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 05:03:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1128 transitions. [2022-01-18 05:03:26,059 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1128 transitions. Word has length 20 [2022-01-18 05:03:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:26,059 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1128 transitions. [2022-01-18 05:03:26,059 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 05:03:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1128 transitions. [2022-01-18 05:03:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:26,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:26,060 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 05:03:26,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 05:03:26,260 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 05:03:26,260 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash -409999546, now seen corresponding path program 290 times [2022-01-18 05:03:26,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103270371] [2022-01-18 05:03:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:26,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:26,353 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 05:03:26,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103270371] [2022-01-18 05:03:26,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103270371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993584019] [2022-01-18 05:03:26,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:26,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:26,354 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 05:03:26,354 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 05:03:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:26,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:26,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:26,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:26,908 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 27 treesize of output 27 [2022-01-18 05:03:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:26,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993584019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:26,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:26,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173328065] [2022-01-18 05:03:26,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:26,933 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 05:03:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:27,263 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2022-01-18 05:03:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:27,264 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 05:03:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:27,264 INFO L225 Difference]: With dead ends: 540 [2022-01-18 05:03:27,264 INFO L226 Difference]: Without dead ends: 540 [2022-01-18 05:03:27,265 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 05:03:27,265 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 05:03:27,265 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 05:03:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-18 05:03:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 369. [2022-01-18 05:03:27,269 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 05:03:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1113 transitions. [2022-01-18 05:03:27,269 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1113 transitions. Word has length 20 [2022-01-18 05:03:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:27,269 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1113 transitions. [2022-01-18 05:03:27,269 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 05:03:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1113 transitions. [2022-01-18 05:03:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:27,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:27,270 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 05:03:27,286 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 05:03:27,470 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 05:03:27,470 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 570453586, now seen corresponding path program 291 times [2022-01-18 05:03:27,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675314200] [2022-01-18 05:03:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:27,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:27,555 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 05:03:27,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675314200] [2022-01-18 05:03:27,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675314200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549397707] [2022-01-18 05:03:27,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:27,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:27,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:27,556 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 05:03:27,556 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 05:03:27,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:27,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:27,904 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 05:03:27,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:28,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:28,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:28,066 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 05:03:28,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549397707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:28,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:28,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:28,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069163740] [2022-01-18 05:03:28,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:28,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:28,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:28,067 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 05:03:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:28,362 INFO L93 Difference]: Finished difference Result 537 states and 1526 transitions. [2022-01-18 05:03:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:28,362 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 05:03:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:28,363 INFO L225 Difference]: With dead ends: 537 [2022-01-18 05:03:28,363 INFO L226 Difference]: Without dead ends: 531 [2022-01-18 05:03:28,363 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 05:03:28,363 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 05:03:28,363 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 05:03:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-18 05:03:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 373. [2022-01-18 05:03:28,367 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 05:03:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1127 transitions. [2022-01-18 05:03:28,368 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1127 transitions. Word has length 20 [2022-01-18 05:03:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:28,368 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1127 transitions. [2022-01-18 05:03:28,368 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 05:03:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1127 transitions. [2022-01-18 05:03:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:28,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:28,368 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:28,384 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 05:03:28,568 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 05:03:28,569 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 594353500, now seen corresponding path program 292 times [2022-01-18 05:03:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436729769] [2022-01-18 05:03:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:28,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:28,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436729769] [2022-01-18 05:03:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436729769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810416768] [2022-01-18 05:03:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:28,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:28,661 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 05:03:28,661 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 05:03:28,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:28,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:28,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:29,013 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 05:03:29,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:29,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:29,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810416768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:29,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550180492] [2022-01-18 05:03:29,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:29,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:29,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:29,198 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 05:03:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:29,562 INFO L93 Difference]: Finished difference Result 543 states and 1547 transitions. [2022-01-18 05:03:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:03:29,562 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 05:03:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:29,563 INFO L225 Difference]: With dead ends: 543 [2022-01-18 05:03:29,563 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 05:03:29,563 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 05:03:29,563 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 05:03:29,564 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 05:03:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 05:03:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 370. [2022-01-18 05:03:29,567 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 05:03:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1117 transitions. [2022-01-18 05:03:29,568 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1117 transitions. Word has length 20 [2022-01-18 05:03:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:29,568 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1117 transitions. [2022-01-18 05:03:29,568 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 05:03:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1117 transitions. [2022-01-18 05:03:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:29,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:29,569 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 05:03:29,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:29,769 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 05:03:29,769 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1623134952, now seen corresponding path program 293 times [2022-01-18 05:03:29,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554692783] [2022-01-18 05:03:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:29,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:29,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554692783] [2022-01-18 05:03:29,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554692783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194859308] [2022-01-18 05:03:29,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:29,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:29,858 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 05:03:29,859 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 05:03:30,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:30,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:30,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:30,143 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 27 treesize of output 21 [2022-01-18 05:03:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:30,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:30,363 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 27 treesize of output 27 [2022-01-18 05:03:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:30,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194859308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:30,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:30,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:30,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994263314] [2022-01-18 05:03:30,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:30,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:30,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:30,387 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 05:03:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:30,670 INFO L93 Difference]: Finished difference Result 476 states and 1404 transitions. [2022-01-18 05:03:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:30,670 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 05:03:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:30,671 INFO L225 Difference]: With dead ends: 476 [2022-01-18 05:03:30,671 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 05:03:30,671 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 05:03:30,671 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 05:03:30,671 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 05:03:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 05:03:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 371. [2022-01-18 05:03:30,675 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 05:03:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1119 transitions. [2022-01-18 05:03:30,675 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1119 transitions. Word has length 20 [2022-01-18 05:03:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:30,675 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1119 transitions. [2022-01-18 05:03:30,676 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 05:03:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1119 transitions. [2022-01-18 05:03:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:30,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:30,676 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:30,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-18 05:03:30,876 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 05:03:30,876 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1677456724, now seen corresponding path program 294 times [2022-01-18 05:03:30,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:30,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525795199] [2022-01-18 05:03:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:30,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:30,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525795199] [2022-01-18 05:03:30,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525795199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267783900] [2022-01-18 05:03:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:30,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:30,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:30,963 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 05:03:30,963 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 05:03:31,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:31,246 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 05:03:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:31,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:31,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:31,471 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 27 treesize of output 27 [2022-01-18 05:03:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267783900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:31,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:31,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547164415] [2022-01-18 05:03:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:31,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:31,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:31,496 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 05:03:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:31,815 INFO L93 Difference]: Finished difference Result 470 states and 1386 transitions. [2022-01-18 05:03:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:31,815 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 05:03:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:31,816 INFO L225 Difference]: With dead ends: 470 [2022-01-18 05:03:31,816 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 05:03:31,816 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 05:03:31,816 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 05:03:31,816 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 05:03:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 05:03:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 360. [2022-01-18 05:03:31,820 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 05:03:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1082 transitions. [2022-01-18 05:03:31,820 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1082 transitions. Word has length 20 [2022-01-18 05:03:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:31,820 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1082 transitions. [2022-01-18 05:03:31,821 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 05:03:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1082 transitions. [2022-01-18 05:03:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:31,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:31,821 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:31,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 05:03:32,021 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 05:03:32,021 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1972883906, now seen corresponding path program 295 times [2022-01-18 05:03:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684863562] [2022-01-18 05:03:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:32,098 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 05:03:32,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684863562] [2022-01-18 05:03:32,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684863562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88650770] [2022-01-18 05:03:32,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:32,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:32,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:32,099 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 05:03:32,099 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 05:03:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:32,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:32,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:32,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:32,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88650770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:32,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:32,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095090312] [2022-01-18 05:03:32,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:32,652 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 05:03:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:32,911 INFO L93 Difference]: Finished difference Result 431 states and 1279 transitions. [2022-01-18 05:03:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:32,911 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 05:03:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:32,912 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:03:32,912 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 05:03:32,912 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 05:03:32,912 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 05:03:32,912 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 05:03:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 05:03:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 357. [2022-01-18 05:03:32,915 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 05:03:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-01-18 05:03:32,916 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 20 [2022-01-18 05:03:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:32,916 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-01-18 05:03:32,916 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 05:03:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-01-18 05:03:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:32,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:32,917 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:32,933 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 05:03:33,117 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 05:03:33,117 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1485535074, now seen corresponding path program 296 times [2022-01-18 05:03:33,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:33,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390923594] [2022-01-18 05:03:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:33,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:33,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390923594] [2022-01-18 05:03:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390923594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886448458] [2022-01-18 05:03:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:33,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:33,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:33,195 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 05:03:33,195 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 05:03:33,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:33,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:33,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:33,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:33,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:33,683 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 27 treesize of output 27 [2022-01-18 05:03:33,706 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 05:03:33,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886448458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:33,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:33,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:33,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064938343] [2022-01-18 05:03:33,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:33,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:33,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:33,706 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 05:03:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:33,921 INFO L93 Difference]: Finished difference Result 438 states and 1269 transitions. [2022-01-18 05:03:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:33,922 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 05:03:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:33,922 INFO L225 Difference]: With dead ends: 438 [2022-01-18 05:03:33,922 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 05:03:33,922 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 05:03:33,923 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 05:03:33,923 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 05:03:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 05:03:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 371. [2022-01-18 05:03:33,926 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 05:03:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1109 transitions. [2022-01-18 05:03:33,927 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1109 transitions. Word has length 20 [2022-01-18 05:03:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:33,927 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1109 transitions. [2022-01-18 05:03:33,927 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 05:03:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1109 transitions. [2022-01-18 05:03:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:33,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:33,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:33,943 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 05:03:34,127 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 05:03:34,128 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1509434988, now seen corresponding path program 297 times [2022-01-18 05:03:34,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267176102] [2022-01-18 05:03:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:34,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:34,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:34,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267176102] [2022-01-18 05:03:34,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267176102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:34,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145950005] [2022-01-18 05:03:34,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:34,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:34,209 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 05:03:34,210 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 05:03:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:34,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:34,559 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 05:03:34,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:34,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:34,708 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 05:03:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145950005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:34,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:34,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:34,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831173185] [2022-01-18 05:03:34,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:34,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:34,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:34,731 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 05:03:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:35,029 INFO L93 Difference]: Finished difference Result 444 states and 1290 transitions. [2022-01-18 05:03:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:35,029 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 05:03:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:35,030 INFO L225 Difference]: With dead ends: 444 [2022-01-18 05:03:35,030 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 05:03:35,030 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 05:03:35,030 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 05:03:35,030 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 05:03:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 05:03:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 369. [2022-01-18 05:03:35,034 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 05:03:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1104 transitions. [2022-01-18 05:03:35,034 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1104 transitions. Word has length 20 [2022-01-18 05:03:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:35,035 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1104 transitions. [2022-01-18 05:03:35,035 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 05:03:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1104 transitions. [2022-01-18 05:03:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:35,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:35,035 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 05:03:35,052 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 05:03:35,244 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 05:03:35,244 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1302397370, now seen corresponding path program 298 times [2022-01-18 05:03:35,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706535516] [2022-01-18 05:03:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:35,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:35,318 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 05:03:35,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706535516] [2022-01-18 05:03:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706535516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134066949] [2022-01-18 05:03:35,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:35,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:35,319 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 05:03:35,320 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 05:03:35,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:35,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:35,629 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 05:03:35,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:35,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:35,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134066949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:35,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:35,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:03:35,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228851014] [2022-01-18 05:03:35,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:35,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:03:35,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:03:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:03:35,791 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 05:03:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:35,999 INFO L93 Difference]: Finished difference Result 413 states and 1225 transitions. [2022-01-18 05:03:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:36,000 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 05:03:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:36,000 INFO L225 Difference]: With dead ends: 413 [2022-01-18 05:03:36,000 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 05:03:36,000 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 05:03:36,001 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 05:03:36,001 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 05:03:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 05:03:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 354. [2022-01-18 05:03:36,004 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 05:03:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1060 transitions. [2022-01-18 05:03:36,004 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1060 transitions. Word has length 20 [2022-01-18 05:03:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:36,004 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1060 transitions. [2022-01-18 05:03:36,004 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 05:03:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1060 transitions. [2022-01-18 05:03:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:36,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:36,005 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:36,021 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 05:03:36,205 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 05:03:36,205 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1257422514, now seen corresponding path program 299 times [2022-01-18 05:03:36,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695797863] [2022-01-18 05:03:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:36,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:36,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695797863] [2022-01-18 05:03:36,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695797863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:36,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304722802] [2022-01-18 05:03:36,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:36,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:36,315 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 05:03:36,315 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 05:03:36,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:36,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:36,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:36,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:36,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:36,884 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 49 treesize of output 45 [2022-01-18 05:03:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:36,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304722802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:36,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:36,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:36,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848780977] [2022-01-18 05:03:36,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:36,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:36,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:36,988 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 05:03:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:37,277 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2022-01-18 05:03:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:37,277 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 05:03:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:37,278 INFO L225 Difference]: With dead ends: 414 [2022-01-18 05:03:37,278 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 05:03:37,278 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 05:03:37,278 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 05:03:37,278 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 05:03:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 05:03:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 362. [2022-01-18 05:03:37,282 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 05:03:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1091 transitions. [2022-01-18 05:03:37,282 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1091 transitions. Word has length 20 [2022-01-18 05:03:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:37,282 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1091 transitions. [2022-01-18 05:03:37,282 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 05:03:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1091 transitions. [2022-01-18 05:03:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:37,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:37,283 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 05:03:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:37,483 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 05:03:37,483 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -375345080, now seen corresponding path program 300 times [2022-01-18 05:03:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535058429] [2022-01-18 05:03:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:37,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:37,576 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 05:03:37,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:37,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535058429] [2022-01-18 05:03:37,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535058429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:37,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157023958] [2022-01-18 05:03:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:37,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:37,577 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 05:03:37,577 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 05:03:37,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:37,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:37,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:37,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:38,022 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 05:03:38,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:38,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:38,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157023958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:38,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:38,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644552653] [2022-01-18 05:03:38,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:38,242 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 05:03:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:38,611 INFO L93 Difference]: Finished difference Result 420 states and 1216 transitions. [2022-01-18 05:03:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:38,611 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 05:03:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:38,612 INFO L225 Difference]: With dead ends: 420 [2022-01-18 05:03:38,612 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 05:03:38,612 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 05:03:38,612 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 05:03:38,612 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 05:03:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 05:03:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 359. [2022-01-18 05:03:38,615 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 05:03:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1080 transitions. [2022-01-18 05:03:38,616 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1080 transitions. Word has length 20 [2022-01-18 05:03:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:38,616 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1080 transitions. [2022-01-18 05:03:38,616 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 05:03:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1080 transitions. [2022-01-18 05:03:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:38,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:38,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:38,633 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 05:03:38,827 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 05:03:38,827 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash -910574882, now seen corresponding path program 301 times [2022-01-18 05:03:38,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120643352] [2022-01-18 05:03:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:38,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:38,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120643352] [2022-01-18 05:03:38,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120643352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981927707] [2022-01-18 05:03:38,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:38,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:38,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:38,920 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 05:03:38,920 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 05:03:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:39,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:39,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:39,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:39,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:39,449 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 05:03:39,554 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 05:03:39,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981927707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:39,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:39,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:39,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211041059] [2022-01-18 05:03:39,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:39,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:39,555 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 05:03:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:39,888 INFO L93 Difference]: Finished difference Result 384 states and 1134 transitions. [2022-01-18 05:03:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:39,888 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 05:03:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:39,889 INFO L225 Difference]: With dead ends: 384 [2022-01-18 05:03:39,889 INFO L226 Difference]: Without dead ends: 372 [2022-01-18 05:03:39,889 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 05:03:39,889 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 05:03:39,889 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 05:03:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-18 05:03:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 356. [2022-01-18 05:03:39,892 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 05:03:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1069 transitions. [2022-01-18 05:03:39,893 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1069 transitions. Word has length 20 [2022-01-18 05:03:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:39,893 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1069 transitions. [2022-01-18 05:03:39,893 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 05:03:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1069 transitions. [2022-01-18 05:03:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:39,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:39,894 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 05:03:39,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-01-18 05:03:40,094 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 05:03:40,094 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash 235558360, now seen corresponding path program 302 times [2022-01-18 05:03:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283549675] [2022-01-18 05:03:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:40,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:40,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283549675] [2022-01-18 05:03:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283549675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525331888] [2022-01-18 05:03:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:40,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:40,258 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 05:03:40,258 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 05:03:40,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:40,594 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 86 treesize of output 68 [2022-01-18 05:03:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:40,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:40,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:40,852 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 49 treesize of output 45 [2022-01-18 05:03:40,963 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 05:03:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525331888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:40,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:40,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:40,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732954778] [2022-01-18 05:03:40,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:40,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:40,964 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 05:03:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:41,292 INFO L93 Difference]: Finished difference Result 501 states and 1427 transitions. [2022-01-18 05:03:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:41,292 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 05:03:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:41,293 INFO L225 Difference]: With dead ends: 501 [2022-01-18 05:03:41,293 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 05:03:41,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:03:41,293 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 05:03:41,293 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 05:03:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 05:03:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 364. [2022-01-18 05:03:41,297 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 05:03:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1105 transitions. [2022-01-18 05:03:41,297 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1105 transitions. Word has length 20 [2022-01-18 05:03:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:41,297 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1105 transitions. [2022-01-18 05:03:41,297 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 05:03:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1105 transitions. [2022-01-18 05:03:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:41,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:41,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:41,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:41,498 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 05:03:41,498 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1117635794, now seen corresponding path program 303 times [2022-01-18 05:03:41,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:41,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348322778] [2022-01-18 05:03:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:41,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:41,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348322778] [2022-01-18 05:03:41,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348322778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481544072] [2022-01-18 05:03:41,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:41,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:41,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:41,600 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 05:03:41,601 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 05:03:41,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:03:41,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:41,970 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 106 treesize of output 84 [2022-01-18 05:03:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:42,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:42,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:42,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:42,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481544072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:42,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:42,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:42,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896877056] [2022-01-18 05:03:42,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:42,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:42,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:42,292 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 05:03:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:42,722 INFO L93 Difference]: Finished difference Result 530 states and 1473 transitions. [2022-01-18 05:03:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:03:42,723 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 05:03:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:42,723 INFO L225 Difference]: With dead ends: 530 [2022-01-18 05:03:42,724 INFO L226 Difference]: Without dead ends: 524 [2022-01-18 05:03:42,724 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 05:03:42,724 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 05:03:42,724 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 05:03:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-18 05:03:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 367. [2022-01-18 05:03:42,728 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 05:03:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1107 transitions. [2022-01-18 05:03:42,728 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1107 transitions. Word has length 20 [2022-01-18 05:03:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1107 transitions. [2022-01-18 05:03:42,728 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 05:03:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1107 transitions. [2022-01-18 05:03:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:42,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:42,729 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:42,745 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 05:03:42,929 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 05:03:42,929 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 976455694, now seen corresponding path program 304 times [2022-01-18 05:03:42,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:42,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420885735] [2022-01-18 05:03:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:42,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:43,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420885735] [2022-01-18 05:03:43,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420885735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030188367] [2022-01-18 05:03:43,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:43,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:43,060 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 05:03:43,060 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 05:03:43,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:43,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:43,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:43,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:43,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:43,765 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 05:03:43,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030188367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:43,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:43,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:43,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273019291] [2022-01-18 05:03:43,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:43,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:43,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:43,766 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 05:03:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:44,099 INFO L93 Difference]: Finished difference Result 498 states and 1414 transitions. [2022-01-18 05:03:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:44,099 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 05:03:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:44,100 INFO L225 Difference]: With dead ends: 498 [2022-01-18 05:03:44,100 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 05:03:44,100 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 05:03:44,100 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 05:03:44,100 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 05:03:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 05:03:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 360. [2022-01-18 05:03:44,104 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 05:03:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1089 transitions. [2022-01-18 05:03:44,105 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1089 transitions. Word has length 20 [2022-01-18 05:03:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:44,105 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1089 transitions. [2022-01-18 05:03:44,105 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 05:03:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1089 transitions. [2022-01-18 05:03:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:44,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:44,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:44,121 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 05:03:44,305 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 05:03:44,306 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1970831314, now seen corresponding path program 305 times [2022-01-18 05:03:44,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:44,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881573682] [2022-01-18 05:03:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:44,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:44,415 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 05:03:44,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881573682] [2022-01-18 05:03:44,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881573682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516110101] [2022-01-18 05:03:44,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:44,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:44,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:44,416 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 05:03:44,416 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 05:03:44,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:44,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:44,790 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 111 treesize of output 87 [2022-01-18 05:03:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:44,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:45,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:45,030 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 05:03:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:45,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516110101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:45,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:45,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:45,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709074929] [2022-01-18 05:03:45,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:45,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:45,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:45,144 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 05:03:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:45,484 INFO L93 Difference]: Finished difference Result 465 states and 1337 transitions. [2022-01-18 05:03:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:45,484 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 05:03:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:45,485 INFO L225 Difference]: With dead ends: 465 [2022-01-18 05:03:45,485 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 05:03:45,485 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 05:03:45,485 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 05:03:45,485 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 05:03:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 05:03:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 357. [2022-01-18 05:03:45,489 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 05:03:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1074 transitions. [2022-01-18 05:03:45,489 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1074 transitions. Word has length 20 [2022-01-18 05:03:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:45,489 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1074 transitions. [2022-01-18 05:03:45,489 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 05:03:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1074 transitions. [2022-01-18 05:03:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:45,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:45,490 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:45,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:45,690 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 05:03:45,690 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1343682850, now seen corresponding path program 306 times [2022-01-18 05:03:45,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:45,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943818720] [2022-01-18 05:03:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:45,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:45,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:45,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943818720] [2022-01-18 05:03:45,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943818720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:45,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173614407] [2022-01-18 05:03:45,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:45,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:45,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:45,791 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 05:03:45,792 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 05:03:45,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:03:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:46,169 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 111 treesize of output 87 [2022-01-18 05:03:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:46,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:46,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:46,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:46,473 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 05:03:46,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173614407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:46,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:46,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:46,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111596442] [2022-01-18 05:03:46,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:46,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:46,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:46,474 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 05:03:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:46,955 INFO L93 Difference]: Finished difference Result 475 states and 1355 transitions. [2022-01-18 05:03:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:03:46,955 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 05:03:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:46,956 INFO L225 Difference]: With dead ends: 475 [2022-01-18 05:03:46,956 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 05:03:46,956 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 05:03:46,956 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 05:03:46,956 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 05:03:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 05:03:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 367. [2022-01-18 05:03:46,960 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 05:03:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1101 transitions. [2022-01-18 05:03:46,960 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1101 transitions. Word has length 20 [2022-01-18 05:03:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:46,961 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1101 transitions. [2022-01-18 05:03:46,961 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 05:03:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1101 transitions. [2022-01-18 05:03:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:46,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:46,961 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:46,977 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 05:03:47,161 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 05:03:47,161 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1319782936, now seen corresponding path program 307 times [2022-01-18 05:03:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:47,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810594789] [2022-01-18 05:03:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:47,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:47,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810594789] [2022-01-18 05:03:47,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810594789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546089759] [2022-01-18 05:03:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:47,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:47,270 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 05:03:47,270 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 05:03:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:47,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:47,700 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 05:03:47,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:47,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:47,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:47,904 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 05:03:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546089759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:47,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:47,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:47,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649857020] [2022-01-18 05:03:47,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:47,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:47,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:47,904 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 05:03:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:48,235 INFO L93 Difference]: Finished difference Result 446 states and 1301 transitions. [2022-01-18 05:03:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:48,235 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 05:03:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:48,236 INFO L225 Difference]: With dead ends: 446 [2022-01-18 05:03:48,236 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 05:03:48,236 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 05:03:48,236 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 05:03:48,236 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 05:03:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 05:03:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 356. [2022-01-18 05:03:48,239 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 05:03:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1069 transitions. [2022-01-18 05:03:48,240 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1069 transitions. Word has length 20 [2022-01-18 05:03:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:48,240 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1069 transitions. [2022-01-18 05:03:48,240 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 05:03:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1069 transitions. [2022-01-18 05:03:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:48,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:48,240 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 05:03:48,257 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 05:03:48,441 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 05:03:48,441 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash 97958482, now seen corresponding path program 308 times [2022-01-18 05:03:48,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:48,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588946730] [2022-01-18 05:03:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:48,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:48,537 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 05:03:48,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588946730] [2022-01-18 05:03:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588946730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792407467] [2022-01-18 05:03:48,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:48,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:48,538 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 05:03:48,538 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 05:03:48,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:48,931 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 54 treesize of output 42 [2022-01-18 05:03:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:48,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:49,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:49,045 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 49 treesize of output 45 [2022-01-18 05:03:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792407467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:49,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:49,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:49,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123909769] [2022-01-18 05:03:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:49,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:49,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:49,162 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 05:03:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:49,494 INFO L93 Difference]: Finished difference Result 386 states and 1138 transitions. [2022-01-18 05:03:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:49,495 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 05:03:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:49,495 INFO L225 Difference]: With dead ends: 386 [2022-01-18 05:03:49,495 INFO L226 Difference]: Without dead ends: 374 [2022-01-18 05:03:49,495 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 05:03:49,496 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 05:03:49,496 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 05:03:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-18 05:03:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2022-01-18 05:03:49,499 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 05:03:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1074 transitions. [2022-01-18 05:03:49,499 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1074 transitions. Word has length 20 [2022-01-18 05:03:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:49,499 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1074 transitions. [2022-01-18 05:03:49,500 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 05:03:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1074 transitions. [2022-01-18 05:03:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:49,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:49,500 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:49,517 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 05:03:49,700 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 05:03:49,700 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash 838855816, now seen corresponding path program 309 times [2022-01-18 05:03:49,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:49,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7441542] [2022-01-18 05:03:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:49,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:49,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7441542] [2022-01-18 05:03:49,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7441542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534015441] [2022-01-18 05:03:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:49,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:49,800 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 05:03:49,800 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 05:03:49,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:03:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:50,201 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 05:03:50,271 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 05:03:50,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:50,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:50,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:50,495 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 05:03:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534015441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:50,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:50,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:50,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389625800] [2022-01-18 05:03:50,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:50,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:50,496 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 05:03:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:50,860 INFO L93 Difference]: Finished difference Result 411 states and 1190 transitions. [2022-01-18 05:03:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:50,860 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 05:03:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:50,861 INFO L225 Difference]: With dead ends: 411 [2022-01-18 05:03:50,861 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 05:03:50,861 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 05:03:50,861 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 05:03:50,861 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 05:03:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 05:03:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 368. [2022-01-18 05:03:50,864 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 05:03:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1101 transitions. [2022-01-18 05:03:50,865 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1101 transitions. Word has length 20 [2022-01-18 05:03:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:50,865 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1101 transitions. [2022-01-18 05:03:50,865 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 05:03:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1101 transitions. [2022-01-18 05:03:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:50,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:50,866 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:50,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 05:03:51,066 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 05:03:51,066 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 862755730, now seen corresponding path program 310 times [2022-01-18 05:03:51,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:51,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533958482] [2022-01-18 05:03:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:51,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:51,176 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 05:03:51,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533958482] [2022-01-18 05:03:51,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533958482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49180772] [2022-01-18 05:03:51,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:51,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:51,178 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 05:03:51,178 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 05:03:51,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:51,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:51,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:51,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:03:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:51,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49180772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:51,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:51,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:51,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794940258] [2022-01-18 05:03:51,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:51,848 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 05:03:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:52,166 INFO L93 Difference]: Finished difference Result 382 states and 1136 transitions. [2022-01-18 05:03:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:52,166 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 05:03:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:52,167 INFO L225 Difference]: With dead ends: 382 [2022-01-18 05:03:52,167 INFO L226 Difference]: Without dead ends: 382 [2022-01-18 05:03:52,167 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 05:03:52,167 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 05:03:52,167 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 05:03:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-18 05:03:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 355. [2022-01-18 05:03:52,170 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 05:03:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-01-18 05:03:52,171 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 20 [2022-01-18 05:03:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:52,171 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-01-18 05:03:52,171 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 05:03:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-01-18 05:03:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:52,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:52,172 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 05:03:52,189 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 05:03:52,372 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 05:03:52,372 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:52,372 INFO L85 PathProgramCache]: Analyzing trace with hash -400908494, now seen corresponding path program 311 times [2022-01-18 05:03:52,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405887482] [2022-01-18 05:03:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:52,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:52,463 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 05:03:52,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405887482] [2022-01-18 05:03:52,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405887482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732115352] [2022-01-18 05:03:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:52,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:52,465 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 05:03:52,465 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 05:03:52,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:52,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:52,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:53,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:53,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:53,086 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 05:03:53,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732115352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:53,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:53,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:53,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410420157] [2022-01-18 05:03:53,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:53,087 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 05:03:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:53,328 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2022-01-18 05:03:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:03:53,328 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 05:03:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:53,329 INFO L225 Difference]: With dead ends: 459 [2022-01-18 05:03:53,329 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 05:03:53,329 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 05:03:53,329 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 05:03:53,329 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 05:03:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 05:03:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 365. [2022-01-18 05:03:53,332 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 05:03:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1109 transitions. [2022-01-18 05:03:53,333 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1109 transitions. Word has length 20 [2022-01-18 05:03:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:53,333 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1109 transitions. [2022-01-18 05:03:53,333 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 05:03:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1109 transitions. [2022-01-18 05:03:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:53,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:53,334 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:53,350 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 05:03:53,534 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 05:03:53,534 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash 481168940, now seen corresponding path program 312 times [2022-01-18 05:03:53,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801802947] [2022-01-18 05:03:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:53,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:53,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801802947] [2022-01-18 05:03:53,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801802947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732020025] [2022-01-18 05:03:53,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:03:53,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:53,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:53,632 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 05:03:53,632 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 05:03:53,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:03:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:53,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:54,050 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 05:03:54,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:54,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:54,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:03:54,234 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 05:03:54,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732020025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:54,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:54,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:54,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140740977] [2022-01-18 05:03:54,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:54,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:54,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:54,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:54,235 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 05:03:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:54,501 INFO L93 Difference]: Finished difference Result 488 states and 1384 transitions. [2022-01-18 05:03:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:03:54,501 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 05:03:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:54,502 INFO L225 Difference]: With dead ends: 488 [2022-01-18 05:03:54,502 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 05:03:54,502 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 05:03:54,502 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 05:03:54,502 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 05:03:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 05:03:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 368. [2022-01-18 05:03:54,506 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 05:03:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1111 transitions. [2022-01-18 05:03:54,506 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1111 transitions. Word has length 20 [2022-01-18 05:03:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1111 transitions. [2022-01-18 05:03:54,506 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 05:03:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1111 transitions. [2022-01-18 05:03:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:54,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:54,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:54,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 05:03:54,707 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 05:03:54,707 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 339988840, now seen corresponding path program 313 times [2022-01-18 05:03:54,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:54,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146523918] [2022-01-18 05:03:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:54,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:54,806 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 05:03:54,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:54,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146523918] [2022-01-18 05:03:54,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146523918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105444135] [2022-01-18 05:03:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:03:54,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:54,807 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 05:03:54,808 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 05:03:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:55,138 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 57 treesize of output 45 [2022-01-18 05:03:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:55,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:55,378 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 05:03:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:55,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105444135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:55,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:55,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:55,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233903704] [2022-01-18 05:03:55,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:55,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:55,433 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 05:03:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:55,755 INFO L93 Difference]: Finished difference Result 517 states and 1481 transitions. [2022-01-18 05:03:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:55,756 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 05:03:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:55,756 INFO L225 Difference]: With dead ends: 517 [2022-01-18 05:03:55,756 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 05:03:55,757 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 05:03:55,757 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 05:03:55,757 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 05:03:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 05:03:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 371. [2022-01-18 05:03:55,761 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 05:03:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1126 transitions. [2022-01-18 05:03:55,761 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1126 transitions. Word has length 20 [2022-01-18 05:03:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:55,761 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1126 transitions. [2022-01-18 05:03:55,761 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 05:03:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1126 transitions. [2022-01-18 05:03:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:55,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:55,762 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:55,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:55,962 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 05:03:55,962 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1334364460, now seen corresponding path program 314 times [2022-01-18 05:03:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:55,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650516002] [2022-01-18 05:03:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:55,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:56,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650516002] [2022-01-18 05:03:56,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650516002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216900428] [2022-01-18 05:03:56,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:03:56,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:56,061 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 05:03:56,062 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 05:03:56,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:03:56,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:56,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:56,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:56,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:56,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:56,631 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 05:03:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:56,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216900428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:56,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:56,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:56,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95467614] [2022-01-18 05:03:56,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:56,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:56,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:56,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:56,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:56,683 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 05:03:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:57,055 INFO L93 Difference]: Finished difference Result 513 states and 1470 transitions. [2022-01-18 05:03:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:03:57,055 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 05:03:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:57,056 INFO L225 Difference]: With dead ends: 513 [2022-01-18 05:03:57,056 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 05:03:57,056 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 05:03:57,056 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 05:03:57,056 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 05:03:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 05:03:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 368. [2022-01-18 05:03:57,060 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 05:03:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1111 transitions. [2022-01-18 05:03:57,060 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1111 transitions. Word has length 20 [2022-01-18 05:03:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:57,060 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1111 transitions. [2022-01-18 05:03:57,060 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 05:03:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1111 transitions. [2022-01-18 05:03:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:57,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:57,061 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 05:03:57,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:57,261 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 05:03:57,261 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1980149704, now seen corresponding path program 315 times [2022-01-18 05:03:57,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845974089] [2022-01-18 05:03:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:57,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:57,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845974089] [2022-01-18 05:03:57,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845974089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895519119] [2022-01-18 05:03:57,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:03:57,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:57,352 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 05:03:57,353 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 05:03:57,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:03:57,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:57,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:57,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:57,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:57,770 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 05:03:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:57,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:57,887 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 05:03:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895519119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:03:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213970979] [2022-01-18 05:03:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:03:57,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:03:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:03:57,940 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 05:03:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:58,263 INFO L93 Difference]: Finished difference Result 505 states and 1433 transitions. [2022-01-18 05:03:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:58,263 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 05:03:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:58,264 INFO L225 Difference]: With dead ends: 505 [2022-01-18 05:03:58,264 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 05:03:58,264 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 05:03:58,264 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 05:03:58,264 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 05:03:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 05:03:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 372. [2022-01-18 05:03:58,268 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 05:03:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1125 transitions. [2022-01-18 05:03:58,268 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1125 transitions. Word has length 20 [2022-01-18 05:03:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:58,268 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1125 transitions. [2022-01-18 05:03:58,269 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 05:03:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1125 transitions. [2022-01-18 05:03:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:58,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:58,269 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:03:58,285 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 05:03:58,469 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 05:03:58,469 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1956249790, now seen corresponding path program 316 times [2022-01-18 05:03:58,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:58,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205845991] [2022-01-18 05:03:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:58,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:58,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205845991] [2022-01-18 05:03:58,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205845991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766386456] [2022-01-18 05:03:58,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:03:58,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:58,566 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 05:03:58,566 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 05:03:58,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:03:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:03:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:03:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:03:58,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:03:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:58,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:03:59,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:03:59,123 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 05:03:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:59,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766386456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:03:59,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:03:59,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:03:59,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802908030] [2022-01-18 05:03:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:03:59,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:03:59,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:03:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:03:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:03:59,178 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 05:03:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:03:59,522 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2022-01-18 05:03:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:03:59,523 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 05:03:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:03:59,523 INFO L225 Difference]: With dead ends: 488 [2022-01-18 05:03:59,523 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 05:03:59,523 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 05:03:59,524 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 05:03:59,524 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 05:03:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 05:03:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 369. [2022-01-18 05:03:59,527 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 05:03:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1115 transitions. [2022-01-18 05:03:59,528 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1115 transitions. Word has length 20 [2022-01-18 05:03:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:03:59,528 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1115 transitions. [2022-01-18 05:03:59,528 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 05:03:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1115 transitions. [2022-01-18 05:03:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:03:59,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:03:59,529 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 05:03:59,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-01-18 05:03:59,729 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 05:03:59,729 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:03:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:03:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash -927468338, now seen corresponding path program 317 times [2022-01-18 05:03:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:03:59,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94358597] [2022-01-18 05:03:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:03:59,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:03:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:03:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:03:59,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:03:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94358597] [2022-01-18 05:03:59,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94358597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:03:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919291696] [2022-01-18 05:03:59,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:03:59,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:03:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:03:59,818 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 05:03:59,819 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 05:03:59,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:03:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:00,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:00,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:00,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:00,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:00,357 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 27 treesize of output 27 [2022-01-18 05:04:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:00,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919291696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:00,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:00,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:00,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945610894] [2022-01-18 05:04:00,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:00,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:00,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:00,409 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 05:04:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:00,691 INFO L93 Difference]: Finished difference Result 441 states and 1299 transitions. [2022-01-18 05:04:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:00,691 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 05:04:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:00,692 INFO L225 Difference]: With dead ends: 441 [2022-01-18 05:04:00,692 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 05:04:00,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:04:00,692 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 05:04:00,692 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 05:04:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 05:04:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 370. [2022-01-18 05:04:00,695 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 05:04:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1117 transitions. [2022-01-18 05:04:00,696 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1117 transitions. Word has length 20 [2022-01-18 05:04:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:00,696 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1117 transitions. [2022-01-18 05:04:00,696 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 05:04:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1117 transitions. [2022-01-18 05:04:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:00,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:00,697 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 05:04:00,713 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 05:04:00,897 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 05:04:00,897 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash 66907282, now seen corresponding path program 318 times [2022-01-18 05:04:00,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:00,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958524911] [2022-01-18 05:04:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:00,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:00,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:00,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958524911] [2022-01-18 05:04:00,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958524911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:00,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187805852] [2022-01-18 05:04:00,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:00,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:00,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:00,992 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 05:04:00,992 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 05:04:01,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:04:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:01,364 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 62 treesize of output 48 [2022-01-18 05:04:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:01,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:01,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:01,582 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 05:04:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187805852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:01,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:01,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446988100] [2022-01-18 05:04:01,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:01,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:01,635 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 05:04:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:01,981 INFO L93 Difference]: Finished difference Result 462 states and 1337 transitions. [2022-01-18 05:04:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:01,982 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 05:04:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:01,982 INFO L225 Difference]: With dead ends: 462 [2022-01-18 05:04:01,982 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 05:04:01,982 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 05:04:01,983 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 05:04:01,983 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 05:04:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 05:04:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 359. [2022-01-18 05:04:01,986 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 05:04:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1080 transitions. [2022-01-18 05:04:01,987 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1080 transitions. Word has length 20 [2022-01-18 05:04:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:01,987 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1080 transitions. [2022-01-18 05:04:01,987 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 05:04:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1080 transitions. [2022-01-18 05:04:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:01,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:01,987 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 05:04:02,003 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 05:04:02,188 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 05:04:02,188 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash -228519900, now seen corresponding path program 319 times [2022-01-18 05:04:02,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:02,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850306509] [2022-01-18 05:04:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:02,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:02,275 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 05:04:02,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:02,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850306509] [2022-01-18 05:04:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850306509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:02,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381278125] [2022-01-18 05:04:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:02,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:02,276 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 05:04:02,277 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 05:04:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:02,678 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 05:04:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:02,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:02,833 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 27 treesize of output 27 [2022-01-18 05:04:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:02,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381278125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:02,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:02,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:02,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56255000] [2022-01-18 05:04:02,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:02,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:02,888 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 05:04:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:03,140 INFO L93 Difference]: Finished difference Result 384 states and 1144 transitions. [2022-01-18 05:04:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:03,140 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 05:04:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:03,141 INFO L225 Difference]: With dead ends: 384 [2022-01-18 05:04:03,141 INFO L226 Difference]: Without dead ends: 384 [2022-01-18 05:04:03,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:04:03,141 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 05:04:03,141 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 05:04:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-18 05:04:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 356. [2022-01-18 05:04:03,144 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 05:04:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1068 transitions. [2022-01-18 05:04:03,145 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1068 transitions. Word has length 20 [2022-01-18 05:04:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:03,145 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1068 transitions. [2022-01-18 05:04:03,145 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 05:04:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1068 transitions. [2022-01-18 05:04:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:03,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:03,146 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:03,162 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 05:04:03,346 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 05:04:03,346 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1065068216, now seen corresponding path program 320 times [2022-01-18 05:04:03,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:03,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233171750] [2022-01-18 05:04:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:03,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:03,417 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 05:04:03,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233171750] [2022-01-18 05:04:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233171750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388715884] [2022-01-18 05:04:03,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:03,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:03,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:03,419 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 05:04:03,419 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 05:04:03,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:03,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:03,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:03,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:03,963 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 05:04:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388715884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:03,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:04:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29565923] [2022-01-18 05:04:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:03,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:04:03,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:04:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:04:03,964 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 05:04:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:04,144 INFO L93 Difference]: Finished difference Result 429 states and 1238 transitions. [2022-01-18 05:04:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:04,144 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 05:04:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:04,145 INFO L225 Difference]: With dead ends: 429 [2022-01-18 05:04:04,145 INFO L226 Difference]: Without dead ends: 423 [2022-01-18 05:04:04,145 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 05:04:04,145 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 05:04:04,145 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 05:04:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-18 05:04:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 370. [2022-01-18 05:04:04,148 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 05:04:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2022-01-18 05:04:04,149 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 20 [2022-01-18 05:04:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:04,149 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2022-01-18 05:04:04,149 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 05:04:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2022-01-18 05:04:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:04,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:04,149 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 05:04:04,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-18 05:04:04,350 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 05:04:04,350 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1041168302, now seen corresponding path program 321 times [2022-01-18 05:04:04,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:04,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328649039] [2022-01-18 05:04:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:04,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:04,424 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 05:04:04,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:04,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328649039] [2022-01-18 05:04:04,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328649039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:04,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205897323] [2022-01-18 05:04:04,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:04,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:04,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:04,425 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 05:04:04,426 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 05:04:04,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:04:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:04,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:04,810 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 05:04:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:04,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:04,936 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 27 treesize of output 27 [2022-01-18 05:04:04,986 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 05:04:04,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205897323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:04,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:04,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:04:04,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556914009] [2022-01-18 05:04:04,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:04,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:04,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:04,986 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 05:04:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:05,190 INFO L93 Difference]: Finished difference Result 435 states and 1259 transitions. [2022-01-18 05:04:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:05,191 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 05:04:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:05,191 INFO L225 Difference]: With dead ends: 435 [2022-01-18 05:04:05,191 INFO L226 Difference]: Without dead ends: 435 [2022-01-18 05:04:05,192 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 05:04:05,192 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 05:04:05,192 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 05:04:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-18 05:04:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 368. [2022-01-18 05:04:05,195 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 05:04:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1102 transitions. [2022-01-18 05:04:05,196 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1102 transitions. Word has length 20 [2022-01-18 05:04:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:05,196 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1102 transitions. [2022-01-18 05:04:05,196 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 05:04:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1102 transitions. [2022-01-18 05:04:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:05,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:05,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:05,213 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 05:04:05,396 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 05:04:05,397 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 441966636, now seen corresponding path program 322 times [2022-01-18 05:04:05,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463228353] [2022-01-18 05:04:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:05,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:05,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463228353] [2022-01-18 05:04:05,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463228353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198803854] [2022-01-18 05:04:05,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:05,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:05,477 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 05:04:05,478 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 05:04:05,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:05,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:05,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:05,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:05,847 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 05:04:05,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:05,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:05,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198803854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:06,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407902845] [2022-01-18 05:04:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:06,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:06,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:06,031 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 05:04:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:06,282 INFO L93 Difference]: Finished difference Result 404 states and 1194 transitions. [2022-01-18 05:04:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:06,282 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 05:04:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:06,283 INFO L225 Difference]: With dead ends: 404 [2022-01-18 05:04:06,283 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 05:04:06,283 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 05:04:06,283 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 05:04:06,283 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 05:04:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 05:04:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 355. [2022-01-18 05:04:06,286 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 05:04:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-01-18 05:04:06,287 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 20 [2022-01-18 05:04:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:06,287 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-01-18 05:04:06,287 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 05:04:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-01-18 05:04:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:06,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:06,288 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 05:04:06,304 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 05:04:06,488 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 05:04:06,488 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1599286462, now seen corresponding path program 323 times [2022-01-18 05:04:06,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:06,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871482828] [2022-01-18 05:04:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:06,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:06,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871482828] [2022-01-18 05:04:06,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871482828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24985033] [2022-01-18 05:04:06,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:06,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:06,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:06,572 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 05:04:06,572 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 05:04:06,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:06,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:06,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:06,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:06,913 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 05:04:06,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:06,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:06,975 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 49 treesize of output 45 [2022-01-18 05:04:07,099 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 05:04:07,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24985033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:07,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:07,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:07,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739097375] [2022-01-18 05:04:07,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:07,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:07,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:07,100 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 05:04:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:07,347 INFO L93 Difference]: Finished difference Result 374 states and 1105 transitions. [2022-01-18 05:04:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:07,347 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 05:04:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:07,347 INFO L225 Difference]: With dead ends: 374 [2022-01-18 05:04:07,347 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 05:04:07,348 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 05:04:07,348 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 05:04:07,348 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 05:04:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 05:04:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 359. [2022-01-18 05:04:07,351 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 05:04:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1074 transitions. [2022-01-18 05:04:07,351 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1074 transitions. Word has length 20 [2022-01-18 05:04:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:07,352 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1074 transitions. [2022-01-18 05:04:07,352 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 05:04:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1074 transitions. [2022-01-18 05:04:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:07,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:07,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:07,368 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 05:04:07,552 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 05:04:07,552 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash -858389128, now seen corresponding path program 324 times [2022-01-18 05:04:07,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:07,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624282296] [2022-01-18 05:04:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:07,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:07,637 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 05:04:07,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624282296] [2022-01-18 05:04:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624282296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780923756] [2022-01-18 05:04:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:07,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:07,639 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 05:04:07,639 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 05:04:07,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:04:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:07,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:07,998 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 05:04:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:08,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:08,065 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 05:04:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780923756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:08,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:08,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:08,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785556201] [2022-01-18 05:04:08,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:08,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:08,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:08,185 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 05:04:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:08,481 INFO L93 Difference]: Finished difference Result 399 states and 1157 transitions. [2022-01-18 05:04:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:08,481 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 05:04:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:08,482 INFO L225 Difference]: With dead ends: 399 [2022-01-18 05:04:08,482 INFO L226 Difference]: Without dead ends: 393 [2022-01-18 05:04:08,482 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 05:04:08,482 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 05:04:08,482 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 05:04:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-18 05:04:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 369. [2022-01-18 05:04:08,486 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 05:04:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1101 transitions. [2022-01-18 05:04:08,493 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1101 transitions. Word has length 20 [2022-01-18 05:04:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:08,493 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1101 transitions. [2022-01-18 05:04:08,493 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 05:04:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1101 transitions. [2022-01-18 05:04:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:08,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:08,494 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:08,510 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 05:04:08,694 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 05:04:08,694 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash -834489214, now seen corresponding path program 325 times [2022-01-18 05:04:08,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:08,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084141722] [2022-01-18 05:04:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:08,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:08,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084141722] [2022-01-18 05:04:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084141722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820997038] [2022-01-18 05:04:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:08,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:08,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:08,763 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 05:04:08,763 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 05:04:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:09,049 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 75 treesize of output 59 [2022-01-18 05:04:09,112 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 05:04:09,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:09,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:09,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:04:09,285 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 05:04:09,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820997038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:09,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:04:09,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045293512] [2022-01-18 05:04:09,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:09,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:04:09,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:04:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:04:09,286 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 05:04:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:09,429 INFO L93 Difference]: Finished difference Result 370 states and 1103 transitions. [2022-01-18 05:04:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:09,429 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 05:04:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:09,430 INFO L225 Difference]: With dead ends: 370 [2022-01-18 05:04:09,430 INFO L226 Difference]: Without dead ends: 370 [2022-01-18 05:04:09,430 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 05:04:09,430 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 05:04:09,430 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 05:04:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-18 05:04:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 357. [2022-01-18 05:04:09,433 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 05:04:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2022-01-18 05:04:09,434 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 20 [2022-01-18 05:04:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2022-01-18 05:04:09,434 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 05:04:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2022-01-18 05:04:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:09,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:09,434 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 05:04:09,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-18 05:04:09,634 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 05:04:09,635 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2125846306, now seen corresponding path program 326 times [2022-01-18 05:04:09,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:09,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814824952] [2022-01-18 05:04:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:09,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:09,697 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 05:04:09,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814824952] [2022-01-18 05:04:09,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814824952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155918223] [2022-01-18 05:04:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:09,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:09,698 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 05:04:09,699 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 05:04:09,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:09,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:09,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:10,010 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 05:04:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:10,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:10,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:10,156 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 05:04:10,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155918223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:10,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:10,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:04:10,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692875578] [2022-01-18 05:04:10,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:10,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:04:10,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:04:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:04:10,157 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 05:04:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:10,342 INFO L93 Difference]: Finished difference Result 405 states and 1172 transitions. [2022-01-18 05:04:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:10,342 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 05:04:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:10,343 INFO L225 Difference]: With dead ends: 405 [2022-01-18 05:04:10,343 INFO L226 Difference]: Without dead ends: 399 [2022-01-18 05:04:10,343 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 05:04:10,343 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 05:04:10,343 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 05:04:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-18 05:04:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 371. [2022-01-18 05:04:10,346 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 05:04:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1108 transitions. [2022-01-18 05:04:10,347 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1108 transitions. Word has length 20 [2022-01-18 05:04:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:10,347 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1108 transitions. [2022-01-18 05:04:10,347 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 05:04:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1108 transitions. [2022-01-18 05:04:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:10,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:10,347 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:10,364 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 05:04:10,548 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 05:04:10,548 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2101946392, now seen corresponding path program 327 times [2022-01-18 05:04:10,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895104739] [2022-01-18 05:04:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:10,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:10,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895104739] [2022-01-18 05:04:10,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895104739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953653748] [2022-01-18 05:04:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:10,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:10,629 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 05:04:10,630 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 05:04:10,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:04:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:10,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:10,953 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 05:04:10,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:11,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:11,053 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 27 treesize of output 27 [2022-01-18 05:04:11,118 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 05:04:11,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953653748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:11,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:11,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:11,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759788525] [2022-01-18 05:04:11,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:11,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:11,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:11,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:11,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:11,118 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 05:04:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:11,351 INFO L93 Difference]: Finished difference Result 405 states and 1178 transitions. [2022-01-18 05:04:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:11,351 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 05:04:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:11,352 INFO L225 Difference]: With dead ends: 405 [2022-01-18 05:04:11,352 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 05:04:11,352 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 05:04:11,352 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 05:04:11,352 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 05:04:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 05:04:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 369. [2022-01-18 05:04:11,355 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 05:04:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1103 transitions. [2022-01-18 05:04:11,356 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1103 transitions. Word has length 20 [2022-01-18 05:04:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:11,356 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1103 transitions. [2022-01-18 05:04:11,356 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 05:04:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1103 transitions. [2022-01-18 05:04:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:11,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:11,357 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:11,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:11,557 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 05:04:11,557 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:11,557 INFO L85 PathProgramCache]: Analyzing trace with hash -618811454, now seen corresponding path program 328 times [2022-01-18 05:04:11,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141271327] [2022-01-18 05:04:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:11,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:11,623 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 05:04:11,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141271327] [2022-01-18 05:04:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141271327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435034724] [2022-01-18 05:04:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:11,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:11,625 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 05:04:11,625 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 05:04:11,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:11,915 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 05:04:11,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:12,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:04:12,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:12,066 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 05:04:12,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435034724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:12,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:12,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:04:12,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056690025] [2022-01-18 05:04:12,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:12,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:04:12,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:04:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:04:12,067 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 05:04:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:12,249 INFO L93 Difference]: Finished difference Result 380 states and 1128 transitions. [2022-01-18 05:04:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:12,249 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 05:04:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:12,250 INFO L225 Difference]: With dead ends: 380 [2022-01-18 05:04:12,250 INFO L226 Difference]: Without dead ends: 380 [2022-01-18 05:04:12,250 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 05:04:12,250 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 05:04:12,250 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 05:04:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-18 05:04:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 352. [2022-01-18 05:04:12,253 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 05:04:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1054 transitions. [2022-01-18 05:04:12,254 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1054 transitions. Word has length 20 [2022-01-18 05:04:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:12,254 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1054 transitions. [2022-01-18 05:04:12,254 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 05:04:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1054 transitions. [2022-01-18 05:04:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:12,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:12,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:12,270 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 05:04:12,454 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 05:04:12,455 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1305061192, now seen corresponding path program 329 times [2022-01-18 05:04:12,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:12,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529159294] [2022-01-18 05:04:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:12,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:12,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529159294] [2022-01-18 05:04:12,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529159294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:12,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393845989] [2022-01-18 05:04:12,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:12,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:12,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:12,563 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 05:04:12,564 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 05:04:12,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:04:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:12,849 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 54 treesize of output 42 [2022-01-18 05:04:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:12,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:13,066 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:13,067 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 24 treesize of output 19 [2022-01-18 05:04:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:13,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393845989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:13,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:13,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:13,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958465769] [2022-01-18 05:04:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:13,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:13,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:13,071 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 05:04:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:13,330 INFO L93 Difference]: Finished difference Result 530 states and 1523 transitions. [2022-01-18 05:04:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:13,330 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 05:04:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:13,331 INFO L225 Difference]: With dead ends: 530 [2022-01-18 05:04:13,331 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 05:04:13,331 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 05:04:13,331 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 05:04:13,331 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 05:04:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 05:04:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 364. [2022-01-18 05:04:13,335 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 05:04:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1095 transitions. [2022-01-18 05:04:13,335 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1095 transitions. Word has length 20 [2022-01-18 05:04:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:13,336 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1095 transitions. [2022-01-18 05:04:13,336 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 05:04:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1095 transitions. [2022-01-18 05:04:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:13,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:13,336 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:13,352 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 05:04:13,536 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 05:04:13,536 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 719820798, now seen corresponding path program 330 times [2022-01-18 05:04:13,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306355596] [2022-01-18 05:04:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:13,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:13,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306355596] [2022-01-18 05:04:13,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306355596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215576565] [2022-01-18 05:04:13,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:13,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:13,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:13,614 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 05:04:13,615 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 05:04:13,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:13,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:13,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:13,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:14,130 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:14,130 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 24 treesize of output 19 [2022-01-18 05:04:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215576565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:14,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:14,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:14,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132091423] [2022-01-18 05:04:14,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:14,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:14,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:14,135 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 05:04:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:14,511 INFO L93 Difference]: Finished difference Result 564 states and 1606 transitions. [2022-01-18 05:04:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:14,511 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 05:04:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:14,512 INFO L225 Difference]: With dead ends: 564 [2022-01-18 05:04:14,512 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 05:04:14,512 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 05:04:14,512 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 05:04:14,512 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 05:04:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 05:04:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 370. [2022-01-18 05:04:14,516 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 05:04:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2022-01-18 05:04:14,517 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 20 [2022-01-18 05:04:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2022-01-18 05:04:14,517 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 05:04:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2022-01-18 05:04:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:14,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:14,517 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:14,534 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 05:04:14,718 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 05:04:14,718 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:14,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1601898232, now seen corresponding path program 331 times [2022-01-18 05:04:14,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:14,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109530417] [2022-01-18 05:04:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:14,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:14,791 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 05:04:14,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109530417] [2022-01-18 05:04:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109530417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089071122] [2022-01-18 05:04:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:14,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:14,792 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 05:04:14,793 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 05:04:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:14,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:15,051 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 54 treesize of output 42 [2022-01-18 05:04:15,155 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 05:04:15,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:15,272 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:15,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089071122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:15,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:15,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:15,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343943267] [2022-01-18 05:04:15,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:15,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:15,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:15,277 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 05:04:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:15,517 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2022-01-18 05:04:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:15,517 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 05:04:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:15,517 INFO L225 Difference]: With dead ends: 521 [2022-01-18 05:04:15,518 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 05:04:15,518 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 05:04:15,518 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 05:04:15,518 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 05:04:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 05:04:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 368. [2022-01-18 05:04:15,521 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 05:04:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1109 transitions. [2022-01-18 05:04:15,522 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1109 transitions. Word has length 20 [2022-01-18 05:04:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:15,522 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1109 transitions. [2022-01-18 05:04:15,522 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 05:04:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1109 transitions. [2022-01-18 05:04:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:15,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:15,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:15,539 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 05:04:15,723 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 05:04:15,723 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1739812181, now seen corresponding path program 332 times [2022-01-18 05:04:15,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794021805] [2022-01-18 05:04:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:15,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:15,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794021805] [2022-01-18 05:04:15,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794021805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:15,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556494477] [2022-01-18 05:04:15,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:15,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:15,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:15,791 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 05:04:15,792 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 05:04:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:16,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:16,220 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 05:04:16,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:16,366 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:16,367 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 40 [2022-01-18 05:04:16,387 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 05:04:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556494477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:16,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:16,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 05:04:16,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337045653] [2022-01-18 05:04:16,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:16,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:16,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:16,388 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 05:04:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:17,125 INFO L93 Difference]: Finished difference Result 666 states and 1802 transitions. [2022-01-18 05:04:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 05:04:17,125 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 05:04:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:17,126 INFO L225 Difference]: With dead ends: 666 [2022-01-18 05:04:17,126 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 05:04:17,126 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 05:04:17,126 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:17,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 237 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:04:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 05:04:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 342. [2022-01-18 05:04:17,130 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 05:04:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1020 transitions. [2022-01-18 05:04:17,131 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1020 transitions. Word has length 20 [2022-01-18 05:04:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:17,131 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1020 transitions. [2022-01-18 05:04:17,131 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 05:04:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1020 transitions. [2022-01-18 05:04:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:17,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:17,131 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 05:04:17,148 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 05:04:17,331 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 05:04:17,332 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash 187919682, now seen corresponding path program 333 times [2022-01-18 05:04:17,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855851470] [2022-01-18 05:04:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:17,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:17,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855851470] [2022-01-18 05:04:17,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855851470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029288382] [2022-01-18 05:04:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:17,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:17,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:17,421 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 05:04:17,421 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 05:04:17,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:04:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:17,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:17,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:17,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:17,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:17,931 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 24 treesize of output 19 [2022-01-18 05:04:17,935 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 05:04:17,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029288382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:17,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:17,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:17,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146915700] [2022-01-18 05:04:17,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:17,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:17,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:17,936 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 05:04:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:18,254 INFO L93 Difference]: Finished difference Result 622 states and 1765 transitions. [2022-01-18 05:04:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:18,254 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 05:04:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:18,255 INFO L225 Difference]: With dead ends: 622 [2022-01-18 05:04:18,255 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 05:04:18,255 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 05:04:18,255 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 05:04:18,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 254 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 05:04:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 05:04:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 344. [2022-01-18 05:04:18,259 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 05:04:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2022-01-18 05:04:18,259 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 20 [2022-01-18 05:04:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2022-01-18 05:04:18,260 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 05:04:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2022-01-18 05:04:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:18,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:18,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:18,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-01-18 05:04:18,460 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 05:04:18,460 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:18,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1399078142, now seen corresponding path program 334 times [2022-01-18 05:04:18,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669880731] [2022-01-18 05:04:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:18,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:18,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:18,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669880731] [2022-01-18 05:04:18,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669880731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:18,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828620679] [2022-01-18 05:04:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:18,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:18,547 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 05:04:18,548 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 05:04:18,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:18,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:18,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:18,921 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 05:04:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:19,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:19,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828620679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:19,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:19,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:19,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514520186] [2022-01-18 05:04:19,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:19,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:19,081 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 05:04:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:19,382 INFO L93 Difference]: Finished difference Result 589 states and 1683 transitions. [2022-01-18 05:04:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:19,383 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 05:04:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:19,384 INFO L225 Difference]: With dead ends: 589 [2022-01-18 05:04:19,384 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 05:04:19,384 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 05:04:19,384 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 05:04:19,384 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 05:04:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 05:04:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 351. [2022-01-18 05:04:19,388 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 05:04:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1059 transitions. [2022-01-18 05:04:19,388 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1059 transitions. Word has length 20 [2022-01-18 05:04:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:19,388 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1059 transitions. [2022-01-18 05:04:19,389 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 05:04:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1059 transitions. [2022-01-18 05:04:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:19,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:19,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:19,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-18 05:04:19,589 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 05:04:19,589 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:19,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:19,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1621734300, now seen corresponding path program 335 times [2022-01-18 05:04:19,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:19,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188477579] [2022-01-18 05:04:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:19,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:19,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188477579] [2022-01-18 05:04:19,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188477579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770701861] [2022-01-18 05:04:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:19,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:19,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:19,698 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 05:04:19,698 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 05:04:19,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:19,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:19,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:19,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:20,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:20,234 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:20,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:20,238 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 05:04:20,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770701861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:20,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:20,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:20,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569975658] [2022-01-18 05:04:20,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:20,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:20,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:20,239 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 05:04:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:20,520 INFO L93 Difference]: Finished difference Result 556 states and 1606 transitions. [2022-01-18 05:04:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:20,521 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 05:04:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:20,521 INFO L225 Difference]: With dead ends: 556 [2022-01-18 05:04:20,522 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 05:04:20,522 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 05:04:20,522 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 05:04:20,522 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 05:04:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 05:04:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 342. [2022-01-18 05:04:20,525 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 05:04:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1020 transitions. [2022-01-18 05:04:20,526 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1020 transitions. Word has length 20 [2022-01-18 05:04:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:20,526 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1020 transitions. [2022-01-18 05:04:20,526 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 05:04:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1020 transitions. [2022-01-18 05:04:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:20,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:20,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:20,543 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 05:04:20,727 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 05:04:20,727 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1922133166, now seen corresponding path program 336 times [2022-01-18 05:04:20,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:20,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450290660] [2022-01-18 05:04:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:20,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:20,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450290660] [2022-01-18 05:04:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450290660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485997256] [2022-01-18 05:04:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:20,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:20,816 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 05:04:20,816 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 05:04:21,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:21,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:21,369 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:21,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:21,374 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 05:04:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485997256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:21,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:21,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:21,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933971810] [2022-01-18 05:04:21,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:21,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:21,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:21,374 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 05:04:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:21,708 INFO L93 Difference]: Finished difference Result 671 states and 1859 transitions. [2022-01-18 05:04:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:21,708 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 05:04:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:21,709 INFO L225 Difference]: With dead ends: 671 [2022-01-18 05:04:21,709 INFO L226 Difference]: Without dead ends: 671 [2022-01-18 05:04:21,709 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 05:04:21,710 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 05:04:21,710 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 05:04:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-18 05:04:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 350. [2022-01-18 05:04:21,714 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 05:04:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1056 transitions. [2022-01-18 05:04:21,714 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1056 transitions. Word has length 20 [2022-01-18 05:04:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:21,715 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1056 transitions. [2022-01-18 05:04:21,715 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 05:04:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1056 transitions. [2022-01-18 05:04:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:21,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:21,715 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 05:04:21,732 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 05:04:21,915 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 05:04:21,915 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1490756696, now seen corresponding path program 337 times [2022-01-18 05:04:21,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374312779] [2022-01-18 05:04:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:21,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:21,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374312779] [2022-01-18 05:04:21,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374312779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375233109] [2022-01-18 05:04:21,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:21,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:21,999 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 05:04:22,000 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 05:04:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:22,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:22,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:22,378 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 05:04:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:22,528 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:22,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:22,532 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 05:04:22,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375233109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:22,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:22,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:22,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399852506] [2022-01-18 05:04:22,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:22,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:22,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:22,533 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 05:04:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:22,816 INFO L93 Difference]: Finished difference Result 605 states and 1705 transitions. [2022-01-18 05:04:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:22,816 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 05:04:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:22,817 INFO L225 Difference]: With dead ends: 605 [2022-01-18 05:04:22,817 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 05:04:22,817 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 05:04:22,817 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 05:04:22,817 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 05:04:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 05:04:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 344. [2022-01-18 05:04:22,822 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 05:04:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1031 transitions. [2022-01-18 05:04:22,822 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1031 transitions. Word has length 20 [2022-01-18 05:04:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:22,822 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1031 transitions. [2022-01-18 05:04:22,822 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 05:04:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1031 transitions. [2022-01-18 05:04:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:22,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:22,823 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 05:04:22,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:23,023 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 05:04:23,023 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1631936796, now seen corresponding path program 338 times [2022-01-18 05:04:23,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:23,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421216643] [2022-01-18 05:04:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:23,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:23,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421216643] [2022-01-18 05:04:23,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421216643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:23,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976759725] [2022-01-18 05:04:23,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:23,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:23,120 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 05:04:23,120 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 05:04:23,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:23,382 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 54 treesize of output 42 [2022-01-18 05:04:23,512 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 05:04:23,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:23,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:23,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976759725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:23,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:23,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:23,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420440727] [2022-01-18 05:04:23,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:23,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:23,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:23,681 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 05:04:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:23,967 INFO L93 Difference]: Finished difference Result 630 states and 1794 transitions. [2022-01-18 05:04:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:23,968 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 05:04:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:23,969 INFO L225 Difference]: With dead ends: 630 [2022-01-18 05:04:23,969 INFO L226 Difference]: Without dead ends: 630 [2022-01-18 05:04:23,969 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 05:04:23,969 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 05:04:23,969 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 05:04:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-18 05:04:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 347. [2022-01-18 05:04:23,979 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 05:04:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1046 transitions. [2022-01-18 05:04:23,979 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1046 transitions. Word has length 20 [2022-01-18 05:04:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:23,980 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1046 transitions. [2022-01-18 05:04:23,980 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 05:04:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1046 transitions. [2022-01-18 05:04:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:23,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:23,980 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 05:04:23,996 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 05:04:24,180 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 05:04:24,181 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -637561176, now seen corresponding path program 339 times [2022-01-18 05:04:24,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:24,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471735898] [2022-01-18 05:04:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:24,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:24,284 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 05:04:24,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471735898] [2022-01-18 05:04:24,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471735898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330436176] [2022-01-18 05:04:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:24,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:24,285 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 05:04:24,285 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 05:04:24,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:24,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:24,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:24,832 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:24,832 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 05:04:24,836 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 05:04:24,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330436176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:24,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:24,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:24,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970711755] [2022-01-18 05:04:24,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:24,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:24,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:24,837 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 05:04:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:25,153 INFO L93 Difference]: Finished difference Result 599 states and 1727 transitions. [2022-01-18 05:04:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:25,153 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 05:04:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:25,154 INFO L225 Difference]: With dead ends: 599 [2022-01-18 05:04:25,154 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 05:04:25,154 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 05:04:25,154 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 05:04:25,154 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 05:04:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 05:04:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 344. [2022-01-18 05:04:25,158 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 05:04:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1031 transitions. [2022-01-18 05:04:25,159 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1031 transitions. Word has length 20 [2022-01-18 05:04:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1031 transitions. [2022-01-18 05:04:25,159 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 05:04:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1031 transitions. [2022-01-18 05:04:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:25,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:25,159 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:25,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-01-18 05:04:25,360 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 05:04:25,360 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash 342891956, now seen corresponding path program 340 times [2022-01-18 05:04:25,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:25,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081214941] [2022-01-18 05:04:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:25,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:25,446 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 05:04:25,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081214941] [2022-01-18 05:04:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081214941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511325743] [2022-01-18 05:04:25,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:25,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:25,447 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 05:04:25,448 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 05:04:25,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:25,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:25,705 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 05:04:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:25,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:25,955 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:25,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:25,959 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 05:04:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511325743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:25,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489031710] [2022-01-18 05:04:25,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:25,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:25,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:25,960 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 05:04:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:26,192 INFO L93 Difference]: Finished difference Result 553 states and 1574 transitions. [2022-01-18 05:04:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:26,192 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 05:04:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:26,193 INFO L225 Difference]: With dead ends: 553 [2022-01-18 05:04:26,193 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 05:04:26,193 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 05:04:26,193 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 05:04:26,193 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 05:04:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 05:04:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 348. [2022-01-18 05:04:26,197 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 05:04:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1045 transitions. [2022-01-18 05:04:26,198 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1045 transitions. Word has length 20 [2022-01-18 05:04:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:26,198 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1045 transitions. [2022-01-18 05:04:26,198 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 05:04:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1045 transitions. [2022-01-18 05:04:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:26,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:26,198 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 05:04:26,215 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 05:04:26,398 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 05:04:26,399 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash 366791870, now seen corresponding path program 341 times [2022-01-18 05:04:26,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:26,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251581366] [2022-01-18 05:04:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:26,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:26,493 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 05:04:26,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:26,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251581366] [2022-01-18 05:04:26,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251581366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:26,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686505237] [2022-01-18 05:04:26,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:26,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:26,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:26,494 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 05:04:26,495 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 05:04:26,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:04:26,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:26,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 05:04:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:26,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:26,947 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 05:04:26,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:27,235 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:27,235 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 7 treesize of output 7 [2022-01-18 05:04:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686505237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:27,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:27,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 05:04:27,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752982795] [2022-01-18 05:04:27,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:27,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:27,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:27,242 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 05:04:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:27,776 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2022-01-18 05:04:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:04:27,776 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 05:04:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:27,777 INFO L225 Difference]: With dead ends: 569 [2022-01-18 05:04:27,777 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 05:04:27,778 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 05:04:27,778 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 05:04:27,778 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 05:04:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 05:04:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 343. [2022-01-18 05:04:27,781 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 05:04:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1027 transitions. [2022-01-18 05:04:27,782 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1027 transitions. Word has length 20 [2022-01-18 05:04:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:27,782 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1027 transitions. [2022-01-18 05:04:27,782 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 05:04:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1027 transitions. [2022-01-18 05:04:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:27,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:27,782 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 05:04:27,799 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 05:04:27,983 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 05:04:27,983 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash -448547172, now seen corresponding path program 342 times [2022-01-18 05:04:27,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152046588] [2022-01-18 05:04:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:27,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:28,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:28,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152046588] [2022-01-18 05:04:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152046588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:28,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307961865] [2022-01-18 05:04:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:28,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:28,060 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 05:04:28,060 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 05:04:28,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:28,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:28,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:28,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:28,519 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 24 treesize of output 19 [2022-01-18 05:04:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307961865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:28,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:28,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798408370] [2022-01-18 05:04:28,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:28,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:28,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:28,524 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 05:04:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:28,773 INFO L93 Difference]: Finished difference Result 521 states and 1545 transitions. [2022-01-18 05:04:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:28,774 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 05:04:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:28,774 INFO L225 Difference]: With dead ends: 521 [2022-01-18 05:04:28,774 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 05:04:28,774 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 05:04:28,775 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 05:04:28,775 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 05:04:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 05:04:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 347. [2022-01-18 05:04:28,778 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 05:04:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1045 transitions. [2022-01-18 05:04:28,779 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1045 transitions. Word has length 20 [2022-01-18 05:04:28,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:28,779 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1045 transitions. [2022-01-18 05:04:28,779 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 05:04:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1045 transitions. [2022-01-18 05:04:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:28,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:28,779 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 05:04:28,796 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 05:04:28,979 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 05:04:28,980 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 762611288, now seen corresponding path program 343 times [2022-01-18 05:04:28,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:28,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197517032] [2022-01-18 05:04:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:28,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:29,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197517032] [2022-01-18 05:04:29,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197517032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:29,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333132825] [2022-01-18 05:04:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:29,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:29,057 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 05:04:29,057 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 05:04:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:29,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:29,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:29,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:29,563 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:29,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:29,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333132825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:29,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:29,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:29,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400809112] [2022-01-18 05:04:29,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:29,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:29,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:29,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:29,568 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 05:04:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:29,840 INFO L93 Difference]: Finished difference Result 515 states and 1505 transitions. [2022-01-18 05:04:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:29,840 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 05:04:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:29,841 INFO L225 Difference]: With dead ends: 515 [2022-01-18 05:04:29,841 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 05:04:29,841 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 05:04:29,841 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 05:04:29,841 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 05:04:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 05:04:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 358. [2022-01-18 05:04:29,845 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 05:04:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1084 transitions. [2022-01-18 05:04:29,845 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1084 transitions. Word has length 20 [2022-01-18 05:04:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:29,845 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1084 transitions. [2022-01-18 05:04:29,845 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 05:04:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1084 transitions. [2022-01-18 05:04:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:29,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:29,846 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 05:04:29,862 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 05:04:30,046 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 05:04:30,046 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:30,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2036766142, now seen corresponding path program 344 times [2022-01-18 05:04:30,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:30,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687113100] [2022-01-18 05:04:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:30,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:30,129 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 05:04:30,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687113100] [2022-01-18 05:04:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687113100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134431132] [2022-01-18 05:04:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:30,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:30,130 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 05:04:30,131 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 05:04:30,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:30,402 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 24 treesize of output 18 [2022-01-18 05:04:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:30,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:30,618 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:30,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134431132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:30,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:30,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:30,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741484732] [2022-01-18 05:04:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:30,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:30,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:30,623 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 05:04:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:30,864 INFO L93 Difference]: Finished difference Result 472 states and 1408 transitions. [2022-01-18 05:04:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:30,864 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 05:04:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:30,865 INFO L225 Difference]: With dead ends: 472 [2022-01-18 05:04:30,865 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:04:30,865 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 05:04:30,865 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:04:30,865 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 05:04:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:04:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2022-01-18 05:04:30,869 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 05:04:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1045 transitions. [2022-01-18 05:04:30,869 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1045 transitions. Word has length 20 [2022-01-18 05:04:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:30,869 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1045 transitions. [2022-01-18 05:04:30,869 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 05:04:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1045 transitions. [2022-01-18 05:04:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:30,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:30,870 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:30,887 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 05:04:31,070 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 05:04:31,070 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -899788350, now seen corresponding path program 345 times [2022-01-18 05:04:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067967708] [2022-01-18 05:04:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:31,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:31,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067967708] [2022-01-18 05:04:31,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067967708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339265271] [2022-01-18 05:04:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:31,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:31,147 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 05:04:31,148 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 05:04:31,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:31,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:31,508 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 05:04:31,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:31,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:31,671 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 24 treesize of output 19 [2022-01-18 05:04:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339265271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:31,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:31,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:31,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742529417] [2022-01-18 05:04:31,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:31,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:31,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:31,676 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 05:04:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:31,985 INFO L93 Difference]: Finished difference Result 425 states and 1250 transitions. [2022-01-18 05:04:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:31,985 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 05:04:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:31,986 INFO L225 Difference]: With dead ends: 425 [2022-01-18 05:04:31,986 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 05:04:31,986 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 05:04:31,986 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 05:04:31,986 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 05:04:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 05:04:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 355. [2022-01-18 05:04:31,990 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 05:04:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1072 transitions. [2022-01-18 05:04:31,990 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1072 transitions. Word has length 20 [2022-01-18 05:04:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:31,990 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1072 transitions. [2022-01-18 05:04:31,990 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 05:04:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1072 transitions. [2022-01-18 05:04:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:31,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:31,991 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 05:04:32,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-01-18 05:04:32,191 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 05:04:32,191 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 374366504, now seen corresponding path program 346 times [2022-01-18 05:04:32,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:32,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298866352] [2022-01-18 05:04:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:32,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:32,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298866352] [2022-01-18 05:04:32,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298866352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:32,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737784992] [2022-01-18 05:04:32,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:32,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:32,269 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 05:04:32,270 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 05:04:32,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:32,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:32,581 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 27 treesize of output 21 [2022-01-18 05:04:32,637 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 05:04:32,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:32,799 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:32,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:32,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737784992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:32,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:32,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:32,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548890272] [2022-01-18 05:04:32,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:32,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:32,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:32,804 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 05:04:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:33,133 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2022-01-18 05:04:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:33,133 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 05:04:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:33,134 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:04:33,134 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 05:04:33,134 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 05:04:33,134 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 05:04:33,134 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 05:04:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 05:04:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 352. [2022-01-18 05:04:33,137 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 05:04:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1057 transitions. [2022-01-18 05:04:33,138 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1057 transitions. Word has length 20 [2022-01-18 05:04:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:33,138 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1057 transitions. [2022-01-18 05:04:33,138 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 05:04:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1057 transitions. [2022-01-18 05:04:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:33,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:33,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:33,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:33,339 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 05:04:33,339 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:33,339 INFO L85 PathProgramCache]: Analyzing trace with hash 376992280, now seen corresponding path program 347 times [2022-01-18 05:04:33,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:33,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379106596] [2022-01-18 05:04:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:33,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:33,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379106596] [2022-01-18 05:04:33,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379106596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180557276] [2022-01-18 05:04:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:33,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:33,406 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 05:04:33,407 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 05:04:33,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:33,745 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 05:04:33,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:33,903 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:33,903 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 24 treesize of output 19 [2022-01-18 05:04:33,907 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 05:04:33,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180557276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:33,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:33,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:33,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482202325] [2022-01-18 05:04:33,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:33,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:33,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:33,908 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 05:04:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:34,143 INFO L93 Difference]: Finished difference Result 389 states and 1158 transitions. [2022-01-18 05:04:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:34,143 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 05:04:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:34,144 INFO L225 Difference]: With dead ends: 389 [2022-01-18 05:04:34,144 INFO L226 Difference]: Without dead ends: 389 [2022-01-18 05:04:34,144 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 05:04:34,144 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 05:04:34,144 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 05:04:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-18 05:04:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 343. [2022-01-18 05:04:34,147 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 05:04:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1027 transitions. [2022-01-18 05:04:34,148 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1027 transitions. Word has length 20 [2022-01-18 05:04:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:34,148 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1027 transitions. [2022-01-18 05:04:34,148 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 05:04:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1027 transitions. [2022-01-18 05:04:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:34,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:34,148 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 05:04:34,165 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 05:04:34,349 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 05:04:34,349 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:34,349 INFO L85 PathProgramCache]: Analyzing trace with hash 649199458, now seen corresponding path program 348 times [2022-01-18 05:04:34,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:34,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34644189] [2022-01-18 05:04:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:34,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:34,433 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 05:04:34,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:34,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34644189] [2022-01-18 05:04:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34644189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:34,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129710752] [2022-01-18 05:04:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:34,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:34,434 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 05:04:34,435 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 05:04:34,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:34,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:34,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:34,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:34,830 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 05:04:34,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:35,006 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:35,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:35,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129710752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:35,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:35,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:35,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475689069] [2022-01-18 05:04:35,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:35,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:35,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:35,011 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 05:04:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:35,379 INFO L93 Difference]: Finished difference Result 558 states and 1575 transitions. [2022-01-18 05:04:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:35,379 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 05:04:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:35,380 INFO L225 Difference]: With dead ends: 558 [2022-01-18 05:04:35,380 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 05:04:35,380 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 05:04:35,381 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 05:04:35,381 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 05:04:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 05:04:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 353. [2022-01-18 05:04:35,384 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 05:04:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1072 transitions. [2022-01-18 05:04:35,385 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1072 transitions. Word has length 20 [2022-01-18 05:04:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:35,385 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1072 transitions. [2022-01-18 05:04:35,385 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 05:04:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1072 transitions. [2022-01-18 05:04:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:35,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:35,386 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 05:04:35,402 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 05:04:35,586 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 05:04:35,586 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1531276892, now seen corresponding path program 349 times [2022-01-18 05:04:35,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:35,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297444877] [2022-01-18 05:04:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:35,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:35,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297444877] [2022-01-18 05:04:35,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297444877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906602063] [2022-01-18 05:04:35,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:35,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:35,672 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 05:04:35,673 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 05:04:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:35,993 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 57 treesize of output 45 [2022-01-18 05:04:36,087 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 05:04:36,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:36,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:36,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:36,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906602063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:36,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:36,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:36,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046376668] [2022-01-18 05:04:36,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:36,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:36,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:36,258 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 05:04:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:36,518 INFO L93 Difference]: Finished difference Result 492 states and 1421 transitions. [2022-01-18 05:04:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:36,518 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 05:04:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:36,519 INFO L225 Difference]: With dead ends: 492 [2022-01-18 05:04:36,519 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 05:04:36,519 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 05:04:36,520 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:04:36,520 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 05:04:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 05:04:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 347. [2022-01-18 05:04:36,523 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 05:04:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1047 transitions. [2022-01-18 05:04:36,524 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1047 transitions. Word has length 20 [2022-01-18 05:04:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1047 transitions. [2022-01-18 05:04:36,524 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 05:04:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1047 transitions. [2022-01-18 05:04:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:36,524 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 05:04:36,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:36,725 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 05:04:36,725 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1390096792, now seen corresponding path program 350 times [2022-01-18 05:04:36,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:36,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676557032] [2022-01-18 05:04:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:36,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676557032] [2022-01-18 05:04:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676557032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009169772] [2022-01-18 05:04:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:36,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:36,816 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 05:04:36,816 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 05:04:37,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:37,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:37,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:37,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:37,378 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:37,378 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 24 treesize of output 19 [2022-01-18 05:04:37,382 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 05:04:37,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009169772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:37,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:37,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:37,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217331133] [2022-01-18 05:04:37,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:37,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:37,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:37,383 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 05:04:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:37,772 INFO L93 Difference]: Finished difference Result 563 states and 1619 transitions. [2022-01-18 05:04:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:37,772 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 05:04:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:37,773 INFO L225 Difference]: With dead ends: 563 [2022-01-18 05:04:37,773 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 05:04:37,773 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 05:04:37,774 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 05:04:37,774 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 05:04:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 05:04:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 350. [2022-01-18 05:04:37,777 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 05:04:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1062 transitions. [2022-01-18 05:04:37,778 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1062 transitions. Word has length 20 [2022-01-18 05:04:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:37,778 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1062 transitions. [2022-01-18 05:04:37,778 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 05:04:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1062 transitions. [2022-01-18 05:04:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:37,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:37,779 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 05:04:37,795 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 05:04:37,979 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 05:04:37,979 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1910494884, now seen corresponding path program 351 times [2022-01-18 05:04:37,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:37,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453496571] [2022-01-18 05:04:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:37,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:38,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:38,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453496571] [2022-01-18 05:04:38,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453496571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:38,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000466019] [2022-01-18 05:04:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:38,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:38,072 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 05:04:38,072 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 05:04:38,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:38,364 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 57 treesize of output 45 [2022-01-18 05:04:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:38,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:38,628 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:38,628 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 05:04:38,632 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 05:04:38,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000466019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:38,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:38,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:38,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91425544] [2022-01-18 05:04:38,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:38,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:38,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:38,633 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 05:04:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:39,016 INFO L93 Difference]: Finished difference Result 532 states and 1552 transitions. [2022-01-18 05:04:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:39,017 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 05:04:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:39,017 INFO L225 Difference]: With dead ends: 532 [2022-01-18 05:04:39,017 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 05:04:39,018 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 05:04:39,018 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 05:04:39,018 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 05:04:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 05:04:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 347. [2022-01-18 05:04:39,022 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 05:04:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1047 transitions. [2022-01-18 05:04:39,022 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1047 transitions. Word has length 20 [2022-01-18 05:04:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:39,023 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1047 transitions. [2022-01-18 05:04:39,023 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 05:04:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1047 transitions. [2022-01-18 05:04:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:39,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:39,023 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 05:04:39,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-01-18 05:04:39,223 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 05:04:39,224 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -930041752, now seen corresponding path program 352 times [2022-01-18 05:04:39,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076803993] [2022-01-18 05:04:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:39,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:39,317 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 05:04:39,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076803993] [2022-01-18 05:04:39,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076803993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:39,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434723647] [2022-01-18 05:04:39,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:39,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:39,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:39,318 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 05:04:39,319 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 05:04:39,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:39,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:39,622 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 57 treesize of output 45 [2022-01-18 05:04:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:39,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:39,858 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:39,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:39,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434723647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:39,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:39,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:39,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068028849] [2022-01-18 05:04:39,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:39,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:39,863 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 05:04:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:40,260 INFO L93 Difference]: Finished difference Result 529 states and 1500 transitions. [2022-01-18 05:04:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:04:40,260 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 05:04:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:40,261 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:04:40,261 INFO L226 Difference]: Without dead ends: 523 [2022-01-18 05:04:40,261 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 05:04:40,261 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 05:04:40,261 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 05:04:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-18 05:04:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 351. [2022-01-18 05:04:40,265 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 05:04:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1061 transitions. [2022-01-18 05:04:40,266 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1061 transitions. Word has length 20 [2022-01-18 05:04:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:40,266 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1061 transitions. [2022-01-18 05:04:40,266 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 05:04:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1061 transitions. [2022-01-18 05:04:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:40,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:40,266 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:40,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:40,466 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 05:04:40,467 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:40,467 INFO L85 PathProgramCache]: Analyzing trace with hash -906141838, now seen corresponding path program 353 times [2022-01-18 05:04:40,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:40,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751753606] [2022-01-18 05:04:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:40,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:40,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751753606] [2022-01-18 05:04:40,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751753606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428548997] [2022-01-18 05:04:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:40,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:40,557 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 05:04:40,557 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 05:04:40,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:04:40,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:40,862 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 57 treesize of output 45 [2022-01-18 05:04:40,940 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 05:04:40,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:41,100 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:41,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:41,104 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 05:04:41,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428548997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:41,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:41,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:41,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851318349] [2022-01-18 05:04:41,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:41,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:41,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:41,105 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 05:04:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:41,554 INFO L93 Difference]: Finished difference Result 535 states and 1521 transitions. [2022-01-18 05:04:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:04:41,555 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 05:04:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:41,555 INFO L225 Difference]: With dead ends: 535 [2022-01-18 05:04:41,555 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 05:04:41,556 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 05:04:41,556 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 05:04:41,556 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 05:04:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 05:04:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 345. [2022-01-18 05:04:41,559 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 05:04:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1036 transitions. [2022-01-18 05:04:41,560 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1036 transitions. Word has length 20 [2022-01-18 05:04:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:41,560 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1036 transitions. [2022-01-18 05:04:41,560 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 05:04:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1036 transitions. [2022-01-18 05:04:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:41,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:41,561 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 05:04:41,577 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 05:04:41,761 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 05:04:41,761 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash 122639614, now seen corresponding path program 354 times [2022-01-18 05:04:41,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:41,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257423478] [2022-01-18 05:04:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:41,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:41,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257423478] [2022-01-18 05:04:41,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257423478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13040659] [2022-01-18 05:04:41,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:41,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:41,852 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 05:04:41,852 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 05:04:42,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:42,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:42,178 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 27 treesize of output 21 [2022-01-18 05:04:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:42,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:42,418 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:42,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13040659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:42,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:42,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324505529] [2022-01-18 05:04:42,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:42,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:42,423 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 05:04:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:42,724 INFO L93 Difference]: Finished difference Result 475 states and 1398 transitions. [2022-01-18 05:04:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:42,725 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 05:04:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:42,725 INFO L225 Difference]: With dead ends: 475 [2022-01-18 05:04:42,725 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 05:04:42,725 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 05:04:42,725 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 05:04:42,726 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 05:04:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 05:04:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 351. [2022-01-18 05:04:42,729 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 05:04:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1063 transitions. [2022-01-18 05:04:42,730 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1063 transitions. Word has length 20 [2022-01-18 05:04:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:42,730 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1063 transitions. [2022-01-18 05:04:42,730 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 05:04:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1063 transitions. [2022-01-18 05:04:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:42,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:42,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:42,746 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 05:04:42,930 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 05:04:42,930 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1117015234, now seen corresponding path program 355 times [2022-01-18 05:04:42,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:42,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440846067] [2022-01-18 05:04:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:42,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:43,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:43,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440846067] [2022-01-18 05:04:43,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440846067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:43,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236197567] [2022-01-18 05:04:43,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:43,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:43,018 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 05:04:43,018 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 05:04:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:43,336 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 27 treesize of output 21 [2022-01-18 05:04:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:43,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:43,561 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:43,561 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 24 treesize of output 19 [2022-01-18 05:04:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:43,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236197567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:43,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:43,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:43,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014654628] [2022-01-18 05:04:43,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:43,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:43,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:43,566 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 05:04:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:43,902 INFO L93 Difference]: Finished difference Result 469 states and 1380 transitions. [2022-01-18 05:04:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:43,902 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 05:04:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:43,903 INFO L225 Difference]: With dead ends: 469 [2022-01-18 05:04:43,903 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 05:04:43,903 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 05:04:43,903 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 05:04:43,903 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 05:04:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 05:04:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 348. [2022-01-18 05:04:43,906 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 05:04:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1048 transitions. [2022-01-18 05:04:43,907 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1048 transitions. Word has length 20 [2022-01-18 05:04:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:43,907 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1048 transitions. [2022-01-18 05:04:43,907 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 05:04:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1048 transitions. [2022-01-18 05:04:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:43,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:43,908 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 05:04:43,924 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 05:04:44,108 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 05:04:44,108 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:44,108 INFO L85 PathProgramCache]: Analyzing trace with hash 821588052, now seen corresponding path program 356 times [2022-01-18 05:04:44,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:44,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949920859] [2022-01-18 05:04:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:44,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:44,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949920859] [2022-01-18 05:04:44,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949920859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599402927] [2022-01-18 05:04:44,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:44,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:44,184 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 05:04:44,185 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 05:04:44,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:44,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:44,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:44,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:44,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:44,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:44,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599402927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:44,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:44,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:44,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783429534] [2022-01-18 05:04:44,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:44,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:44,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:44,740 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 05:04:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:45,061 INFO L93 Difference]: Finished difference Result 430 states and 1273 transitions. [2022-01-18 05:04:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:45,062 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 05:04:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:45,062 INFO L225 Difference]: With dead ends: 430 [2022-01-18 05:04:45,062 INFO L226 Difference]: Without dead ends: 430 [2022-01-18 05:04:45,062 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 05:04:45,063 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 05:04:45,063 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 05:04:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-18 05:04:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 345. [2022-01-18 05:04:45,066 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 05:04:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1036 transitions. [2022-01-18 05:04:45,066 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1036 transitions. Word has length 20 [2022-01-18 05:04:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:45,066 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1036 transitions. [2022-01-18 05:04:45,066 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 05:04:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1036 transitions. [2022-01-18 05:04:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:45,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:45,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:45,083 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 05:04:45,267 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 05:04:45,267 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -14960264, now seen corresponding path program 357 times [2022-01-18 05:04:45,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:45,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688443627] [2022-01-18 05:04:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:45,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:45,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688443627] [2022-01-18 05:04:45,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688443627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372731964] [2022-01-18 05:04:45,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:45,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:45,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:45,343 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 05:04:45,343 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 05:04:45,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:04:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:45,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:45,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:45,862 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:45,862 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 24 treesize of output 19 [2022-01-18 05:04:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:45,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372731964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:45,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:45,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44105680] [2022-01-18 05:04:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:45,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:45,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:45,867 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 05:04:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:46,122 INFO L93 Difference]: Finished difference Result 431 states and 1248 transitions. [2022-01-18 05:04:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:46,122 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 05:04:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:46,122 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:04:46,122 INFO L226 Difference]: Without dead ends: 425 [2022-01-18 05:04:46,123 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 05:04:46,123 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 05:04:46,123 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 05:04:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-18 05:04:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 353. [2022-01-18 05:04:46,126 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 05:04:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1062 transitions. [2022-01-18 05:04:46,127 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1062 transitions. Word has length 20 [2022-01-18 05:04:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:46,127 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1062 transitions. [2022-01-18 05:04:46,127 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 05:04:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1062 transitions. [2022-01-18 05:04:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:46,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:46,127 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:46,144 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 05:04:46,327 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 05:04:46,328 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash 8939650, now seen corresponding path program 358 times [2022-01-18 05:04:46,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:46,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814709463] [2022-01-18 05:04:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:46,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:46,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:46,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814709463] [2022-01-18 05:04:46,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814709463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:46,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873979607] [2022-01-18 05:04:46,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:46,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:46,406 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 05:04:46,407 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 05:04:46,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:46,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:46,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:46,775 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 05:04:46,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:46,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:46,932 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 24 treesize of output 19 [2022-01-18 05:04:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873979607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:46,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:46,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:46,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773700075] [2022-01-18 05:04:46,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:46,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:46,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:46,937 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 05:04:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:47,252 INFO L93 Difference]: Finished difference Result 437 states and 1269 transitions. [2022-01-18 05:04:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:47,253 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 05:04:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:47,253 INFO L225 Difference]: With dead ends: 437 [2022-01-18 05:04:47,253 INFO L226 Difference]: Without dead ends: 437 [2022-01-18 05:04:47,254 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 05:04:47,254 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 05:04:47,254 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 05:04:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-18 05:04:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 349. [2022-01-18 05:04:47,257 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 05:04:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1048 transitions. [2022-01-18 05:04:47,258 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1048 transitions. Word has length 20 [2022-01-18 05:04:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1048 transitions. [2022-01-18 05:04:47,258 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 05:04:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1048 transitions. [2022-01-18 05:04:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:47,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:47,258 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:47,275 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 05:04:47,459 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 05:04:47,459 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1492074588, now seen corresponding path program 359 times [2022-01-18 05:04:47,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411023947] [2022-01-18 05:04:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:47,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:47,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411023947] [2022-01-18 05:04:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411023947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837146853] [2022-01-18 05:04:47,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:47,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:47,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:47,541 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 05:04:47,541 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 05:04:47,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:04:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:47,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:48,009 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:48,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:48,013 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 05:04:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837146853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:48,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:48,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:04:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817018667] [2022-01-18 05:04:48,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:48,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:04:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:04:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:04:48,014 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 05:04:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:48,234 INFO L93 Difference]: Finished difference Result 412 states and 1219 transitions. [2022-01-18 05:04:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:48,234 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 05:04:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:48,234 INFO L225 Difference]: With dead ends: 412 [2022-01-18 05:04:48,234 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 05:04:48,235 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 05:04:48,235 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 05:04:48,235 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 05:04:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 05:04:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 344. [2022-01-18 05:04:48,238 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 05:04:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1033 transitions. [2022-01-18 05:04:48,238 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1033 transitions. Word has length 20 [2022-01-18 05:04:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1033 transitions. [2022-01-18 05:04:48,239 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 05:04:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1033 transitions. [2022-01-18 05:04:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:48,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:48,239 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:48,259 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 05:04:48,456 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 05:04:48,456 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1027070406, now seen corresponding path program 360 times [2022-01-18 05:04:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:48,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494715454] [2022-01-18 05:04:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:48,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:48,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:48,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494715454] [2022-01-18 05:04:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494715454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813947922] [2022-01-18 05:04:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:48,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:48,528 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 05:04:48,529 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 05:04:48,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:04:48,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:48,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:48,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:48,955 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:48,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:48,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813947922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:48,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:48,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:48,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632050212] [2022-01-18 05:04:48,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:48,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:48,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:48,960 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 05:04:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:49,218 INFO L93 Difference]: Finished difference Result 563 states and 1613 transitions. [2022-01-18 05:04:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:49,218 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 05:04:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:49,219 INFO L225 Difference]: With dead ends: 563 [2022-01-18 05:04:49,219 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 05:04:49,219 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 05:04:49,219 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 05:04:49,219 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 05:04:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 05:04:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 327. [2022-01-18 05:04:49,223 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 05:04:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 979 transitions. [2022-01-18 05:04:49,223 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 979 transitions. Word has length 20 [2022-01-18 05:04:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:49,223 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 979 transitions. [2022-01-18 05:04:49,223 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 05:04:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 979 transitions. [2022-01-18 05:04:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:49,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:49,224 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 05:04:49,240 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 05:04:49,424 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 05:04:49,424 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2056738430, now seen corresponding path program 361 times [2022-01-18 05:04:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744607870] [2022-01-18 05:04:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:49,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:49,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744607870] [2022-01-18 05:04:49,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744607870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:49,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049246450] [2022-01-18 05:04:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:49,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:49,496 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 05:04:49,496 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 05:04:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:49,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:49,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:49,981 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:49,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:49,985 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 05:04:49,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049246450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:49,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:49,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:49,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246661314] [2022-01-18 05:04:49,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:49,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:49,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:49,986 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 05:04:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:50,233 INFO L93 Difference]: Finished difference Result 582 states and 1653 transitions. [2022-01-18 05:04:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:50,233 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 05:04:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:50,234 INFO L225 Difference]: With dead ends: 582 [2022-01-18 05:04:50,234 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 05:04:50,234 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 05:04:50,234 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 05:04:50,234 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 05:04:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 05:04:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 334. [2022-01-18 05:04:50,238 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 05:04:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1008 transitions. [2022-01-18 05:04:50,238 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1008 transitions. Word has length 20 [2022-01-18 05:04:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1008 transitions. [2022-01-18 05:04:50,239 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 05:04:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1008 transitions. [2022-01-18 05:04:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:50,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:50,239 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:50,256 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 05:04:50,439 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 05:04:50,439 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -782583576, now seen corresponding path program 362 times [2022-01-18 05:04:50,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074278208] [2022-01-18 05:04:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:50,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074278208] [2022-01-18 05:04:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074278208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369202075] [2022-01-18 05:04:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:50,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:50,514 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 05:04:50,515 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 05:04:50,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:50,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:50,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:50,993 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:50,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:50,997 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 05:04:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369202075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:50,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:50,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:50,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16290822] [2022-01-18 05:04:50,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:50,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:50,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:50,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:50,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:50,998 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 05:04:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:51,229 INFO L93 Difference]: Finished difference Result 539 states and 1556 transitions. [2022-01-18 05:04:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:51,229 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 05:04:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:51,230 INFO L225 Difference]: With dead ends: 539 [2022-01-18 05:04:51,230 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 05:04:51,230 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 05:04:51,230 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 05:04:51,230 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 05:04:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 05:04:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 325. [2022-01-18 05:04:51,234 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 05:04:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2022-01-18 05:04:51,234 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 20 [2022-01-18 05:04:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:51,234 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2022-01-18 05:04:51,234 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 05:04:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2022-01-18 05:04:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:51,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:51,235 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 05:04:51,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:51,435 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 05:04:51,435 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 575829228, now seen corresponding path program 363 times [2022-01-18 05:04:51,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:51,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128029920] [2022-01-18 05:04:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:51,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128029920] [2022-01-18 05:04:51,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128029920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053718107] [2022-01-18 05:04:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:51,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:51,532 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 05:04:51,533 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 05:04:51,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:51,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:51,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:52,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:52,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:52,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053718107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:52,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:52,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:04:52,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568403967] [2022-01-18 05:04:52,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:04:52,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:04:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:04:52,064 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 05:04:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:52,379 INFO L93 Difference]: Finished difference Result 477 states and 1338 transitions. [2022-01-18 05:04:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:52,379 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 05:04:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:52,379 INFO L225 Difference]: With dead ends: 477 [2022-01-18 05:04:52,380 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 05:04:52,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:04:52,380 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 05:04:52,380 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 05:04:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 05:04:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 326. [2022-01-18 05:04:52,383 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 05:04:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 971 transitions. [2022-01-18 05:04:52,383 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 971 transitions. Word has length 20 [2022-01-18 05:04:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:52,383 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 971 transitions. [2022-01-18 05:04:52,384 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 05:04:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 971 transitions. [2022-01-18 05:04:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:52,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:52,384 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:52,400 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 05:04:52,584 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 05:04:52,584 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1849984082, now seen corresponding path program 364 times [2022-01-18 05:04:52,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:52,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52968331] [2022-01-18 05:04:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:52,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:52,659 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 05:04:52,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52968331] [2022-01-18 05:04:52,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52968331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396613800] [2022-01-18 05:04:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:52,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:52,660 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 05:04:52,661 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 05:04:52,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:52,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:52,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:52,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:53,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:53,156 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:53,157 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 24 treesize of output 19 [2022-01-18 05:04:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:53,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396613800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:53,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:53,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:53,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206923879] [2022-01-18 05:04:53,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:53,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:53,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:53,162 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 05:04:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:53,425 INFO L93 Difference]: Finished difference Result 479 states and 1342 transitions. [2022-01-18 05:04:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:53,426 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 05:04:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:53,426 INFO L225 Difference]: With dead ends: 479 [2022-01-18 05:04:53,426 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 05:04:53,427 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 05:04:53,427 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 05:04:53,427 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 05:04:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 05:04:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 323. [2022-01-18 05:04:53,430 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 05:04:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2022-01-18 05:04:53,431 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 20 [2022-01-18 05:04:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2022-01-18 05:04:53,431 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 05:04:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2022-01-18 05:04:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:53,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:53,431 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:53,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-01-18 05:04:53,631 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 05:04:53,632 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1852609858, now seen corresponding path program 365 times [2022-01-18 05:04:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518340966] [2022-01-18 05:04:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:53,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518340966] [2022-01-18 05:04:53,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518340966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44901684] [2022-01-18 05:04:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:53,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:53,695 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 05:04:53,696 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 05:04:53,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:54,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:54,169 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:54,170 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 05:04:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44901684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:54,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:54,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:54,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289766284] [2022-01-18 05:04:54,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:54,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:54,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:54,174 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 05:04:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:54,437 INFO L93 Difference]: Finished difference Result 428 states and 1211 transitions. [2022-01-18 05:04:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:54,437 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 05:04:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:54,438 INFO L225 Difference]: With dead ends: 428 [2022-01-18 05:04:54,438 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 05:04:54,438 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 05:04:54,438 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 05:04:54,438 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 05:04:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 05:04:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 304. [2022-01-18 05:04:54,441 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 05:04:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2022-01-18 05:04:54,442 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2022-01-18 05:04:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:54,442 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2022-01-18 05:04:54,442 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 05:04:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2022-01-18 05:04:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:54,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:54,442 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:54,459 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 05:04:54,642 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 05:04:54,643 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:54,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1131133826, now seen corresponding path program 366 times [2022-01-18 05:04:54,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:54,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212407559] [2022-01-18 05:04:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:54,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:54,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212407559] [2022-01-18 05:04:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212407559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994122607] [2022-01-18 05:04:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:04:54,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:54,716 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 05:04:54,716 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 05:04:54,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:04:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:55,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:55,094 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 05:04:55,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:55,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:55,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994122607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:55,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:55,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783240576] [2022-01-18 05:04:55,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:55,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:55,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:55,247 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 05:04:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:55,591 INFO L93 Difference]: Finished difference Result 507 states and 1425 transitions. [2022-01-18 05:04:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:55,592 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 05:04:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:55,592 INFO L225 Difference]: With dead ends: 507 [2022-01-18 05:04:55,592 INFO L226 Difference]: Without dead ends: 507 [2022-01-18 05:04:55,593 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 05:04:55,593 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 05:04:55,593 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 05:04:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-18 05:04:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 313. [2022-01-18 05:04:55,596 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 05:04:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 936 transitions. [2022-01-18 05:04:55,597 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 936 transitions. Word has length 20 [2022-01-18 05:04:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:55,597 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 936 transitions. [2022-01-18 05:04:55,597 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 05:04:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 936 transitions. [2022-01-18 05:04:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:55,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:55,597 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:55,614 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 05:04:55,797 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 05:04:55,798 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 143021028, now seen corresponding path program 367 times [2022-01-18 05:04:55,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001468251] [2022-01-18 05:04:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:55,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:55,874 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 05:04:55,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001468251] [2022-01-18 05:04:55,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001468251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238624090] [2022-01-18 05:04:55,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:04:55,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:55,876 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 05:04:55,876 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 05:04:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:56,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:04:56,229 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 05:04:56,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:56,379 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:56,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238624090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:56,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:56,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:04:56,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238991288] [2022-01-18 05:04:56,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:04:56,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:04:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:04:56,384 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 05:04:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:56,698 INFO L93 Difference]: Finished difference Result 513 states and 1440 transitions. [2022-01-18 05:04:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:04:56,698 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 05:04:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:56,699 INFO L225 Difference]: With dead ends: 513 [2022-01-18 05:04:56,699 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 05:04:56,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:04:56,699 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 05:04:56,699 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 05:04:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 05:04:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2022-01-18 05:04:56,703 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 05:04:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 921 transitions. [2022-01-18 05:04:56,703 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 921 transitions. Word has length 20 [2022-01-18 05:04:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:56,703 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 921 transitions. [2022-01-18 05:04:56,703 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 05:04:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 921 transitions. [2022-01-18 05:04:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:56,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:56,704 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 05:04:56,720 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 05:04:56,904 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 05:04:56,904 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 145646804, now seen corresponding path program 368 times [2022-01-18 05:04:56,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:56,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856441353] [2022-01-18 05:04:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:56,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:56,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856441353] [2022-01-18 05:04:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856441353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872998000] [2022-01-18 05:04:56,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:04:56,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:56,985 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 05:04:56,985 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 05:04:57,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:04:57,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:57,299 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 05:04:57,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:57,427 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:57,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:57,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872998000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:57,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:57,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:04:57,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944848704] [2022-01-18 05:04:57,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:57,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:04:57,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:04:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:04:57,433 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 05:04:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:57,611 INFO L93 Difference]: Finished difference Result 477 states and 1348 transitions. [2022-01-18 05:04:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:57,611 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 05:04:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:57,612 INFO L225 Difference]: With dead ends: 477 [2022-01-18 05:04:57,612 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 05:04:57,612 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 05:04:57,612 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 05:04:57,612 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 05:04:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 05:04:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 307. [2022-01-18 05:04:57,615 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 05:04:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 909 transitions. [2022-01-18 05:04:57,616 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 909 transitions. Word has length 20 [2022-01-18 05:04:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:57,616 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 909 transitions. [2022-01-18 05:04:57,616 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 05:04:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 909 transitions. [2022-01-18 05:04:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:57,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:57,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:57,633 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 05:04:57,817 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 05:04:57,817 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1321137448, now seen corresponding path program 369 times [2022-01-18 05:04:57,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:57,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510601022] [2022-01-18 05:04:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:57,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:57,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510601022] [2022-01-18 05:04:57,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510601022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915924319] [2022-01-18 05:04:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:04:57,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:57,878 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 05:04:57,878 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 05:04:58,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:04:58,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:58,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:58,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:58,336 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:58,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:04:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:58,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915924319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:58,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:58,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:04:58,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068100322] [2022-01-18 05:04:58,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:58,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:04:58,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:04:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:04:58,341 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 05:04:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:58,626 INFO L93 Difference]: Finished difference Result 468 states and 1321 transitions. [2022-01-18 05:04:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:58,626 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 05:04:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:58,627 INFO L225 Difference]: With dead ends: 468 [2022-01-18 05:04:58,627 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 05:04:58,627 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 05:04:58,627 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 05:04:58,627 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 05:04:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 05:04:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 309. [2022-01-18 05:04:58,630 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 05:04:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 916 transitions. [2022-01-18 05:04:58,631 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 916 transitions. Word has length 20 [2022-01-18 05:04:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 916 transitions. [2022-01-18 05:04:58,631 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 05:04:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 916 transitions. [2022-01-18 05:04:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:58,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:58,631 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:04:58,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:58,832 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 05:04:58,832 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1065517497, now seen corresponding path program 370 times [2022-01-18 05:04:58,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757553616] [2022-01-18 05:04:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:58,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:58,880 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 05:04:58,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757553616] [2022-01-18 05:04:58,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757553616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623233493] [2022-01-18 05:04:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:04:58,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:58,881 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 05:04:58,882 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 05:04:59,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:04:59,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:04:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:04:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:04:59,165 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 54 treesize of output 42 [2022-01-18 05:04:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:59,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:04:59,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:04:59,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:04:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623233493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:04:59,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:04:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 05:04:59,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540154769] [2022-01-18 05:04:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:04:59,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:04:59,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:04:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:04:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:04:59,341 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 05:04:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:04:59,658 INFO L93 Difference]: Finished difference Result 393 states and 1111 transitions. [2022-01-18 05:04:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:04:59,658 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 05:04:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:04:59,659 INFO L225 Difference]: With dead ends: 393 [2022-01-18 05:04:59,659 INFO L226 Difference]: Without dead ends: 285 [2022-01-18 05:04:59,659 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 05:04:59,659 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 05:04:59,659 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 05:04:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-18 05:04:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-01-18 05:04:59,661 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 05:04:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2022-01-18 05:04:59,662 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2022-01-18 05:04:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:04:59,662 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2022-01-18 05:04:59,662 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 05:04:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2022-01-18 05:04:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:04:59,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:04:59,662 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 05:04:59,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-01-18 05:04:59,863 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 05:04:59,863 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:04:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:04:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash -425786254, now seen corresponding path program 371 times [2022-01-18 05:04:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:04:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192303997] [2022-01-18 05:04:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:04:59,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:04:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:04:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:04:59,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:04:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192303997] [2022-01-18 05:04:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192303997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:04:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593287668] [2022-01-18 05:04:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:04:59,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:04:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:04:59,950 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 05:04:59,950 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 05:05:00,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:00,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:00,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:00,550 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:00,550 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 24 treesize of output 19 [2022-01-18 05:05:00,554 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 05:05:00,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593287668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:00,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:00,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:00,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193613268] [2022-01-18 05:05:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:00,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:00,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:00,555 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 05:05:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:00,950 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2022-01-18 05:05:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:00,951 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 05:05:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:00,951 INFO L225 Difference]: With dead ends: 525 [2022-01-18 05:05:00,951 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 05:05:00,952 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 05:05:00,952 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 05:05:00,952 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 05:05:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 05:05:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2022-01-18 05:05:00,955 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 05:05:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2022-01-18 05:05:00,956 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2022-01-18 05:05:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:00,956 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2022-01-18 05:05:00,956 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 05:05:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2022-01-18 05:05:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:00,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:00,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:00,973 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 05:05:01,156 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 05:05:01,157 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:01,157 INFO L85 PathProgramCache]: Analyzing trace with hash 456291180, now seen corresponding path program 372 times [2022-01-18 05:05:01,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:01,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758467569] [2022-01-18 05:05:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:01,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:01,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758467569] [2022-01-18 05:05:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758467569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760134732] [2022-01-18 05:05:01,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:01,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:01,249 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 05:05:01,249 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 05:05:01,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:01,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:01,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:01,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:01,801 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:01,801 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 24 treesize of output 19 [2022-01-18 05:05:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:01,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760134732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:01,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:01,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:05:01,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401602314] [2022-01-18 05:05:01,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:01,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:01,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:01,806 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 05:05:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:02,170 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2022-01-18 05:05:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:02,170 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 05:05:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:02,171 INFO L225 Difference]: With dead ends: 511 [2022-01-18 05:05:02,171 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 05:05:02,171 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 05:05:02,171 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 05:05:02,171 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 05:05:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 05:05:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2022-01-18 05:05:02,175 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 05:05:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2022-01-18 05:05:02,175 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2022-01-18 05:05:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2022-01-18 05:05:02,175 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 05:05:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2022-01-18 05:05:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:02,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:02,176 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:02,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-01-18 05:05:02,376 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 05:05:02,376 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash 315111080, now seen corresponding path program 373 times [2022-01-18 05:05:02,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:02,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967804783] [2022-01-18 05:05:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:02,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:02,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967804783] [2022-01-18 05:05:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967804783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629372400] [2022-01-18 05:05:02,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:02,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:02,468 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 05:05:02,469 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 05:05:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:02,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:03,065 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:03,066 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 24 treesize of output 19 [2022-01-18 05:05:03,070 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 05:05:03,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629372400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:03,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:03,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:03,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508027982] [2022-01-18 05:05:03,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:03,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:03,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:03,071 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 05:05:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:03,661 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2022-01-18 05:05:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:03,661 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 05:05:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:03,662 INFO L225 Difference]: With dead ends: 582 [2022-01-18 05:05:03,662 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 05:05:03,662 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 05:05:03,662 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 05:05:03,662 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 05:05:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 05:05:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2022-01-18 05:05:03,666 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 05:05:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 05:05:03,666 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 05:05:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 05:05:03,666 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 05:05:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 05:05:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:03,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:03,667 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 05:05:03,683 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 05:05:03,867 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 05:05:03,867 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1309486700, now seen corresponding path program 374 times [2022-01-18 05:05:03,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823059717] [2022-01-18 05:05:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:03,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:03,961 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 05:05:03,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823059717] [2022-01-18 05:05:03,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823059717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997381592] [2022-01-18 05:05:03,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:03,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:03,963 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 05:05:03,963 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 05:05:04,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:04,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:04,384 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 05:05:04,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:04,560 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:04,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:04,564 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 05:05:04,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997381592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:04,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:04,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:04,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587485591] [2022-01-18 05:05:04,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:04,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:04,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:04,565 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 05:05:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:05,183 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2022-01-18 05:05:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:05,183 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 05:05:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:05,184 INFO L225 Difference]: With dead ends: 551 [2022-01-18 05:05:05,184 INFO L226 Difference]: Without dead ends: 551 [2022-01-18 05:05:05,184 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 05:05:05,184 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 05:05:05,184 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 05:05:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-18 05:05:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2022-01-18 05:05:05,188 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 05:05:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2022-01-18 05:05:05,188 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2022-01-18 05:05:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:05,188 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2022-01-18 05:05:05,188 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 05:05:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2022-01-18 05:05:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:05,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:05,189 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:05,205 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 05:05:05,389 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 05:05:05,389 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2005027464, now seen corresponding path program 375 times [2022-01-18 05:05:05,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:05,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193075435] [2022-01-18 05:05:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:05,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:05,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:05,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193075435] [2022-01-18 05:05:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193075435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:05,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713100093] [2022-01-18 05:05:05,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:05,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:05,478 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 05:05:05,478 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 05:05:05,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:05:05,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:05,791 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 57 treesize of output 45 [2022-01-18 05:05:05,879 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 05:05:05,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:06,033 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:06,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:06,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713100093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:06,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:06,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:05:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303332198] [2022-01-18 05:05:06,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:06,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:06,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:06,038 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 05:05:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:06,502 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2022-01-18 05:05:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:06,503 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 05:05:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:06,503 INFO L225 Difference]: With dead ends: 548 [2022-01-18 05:05:06,503 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 05:05:06,504 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 05:05:06,504 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 05:05:06,504 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 05:05:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 05:05:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2022-01-18 05:05:06,507 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 05:05:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2022-01-18 05:05:06,508 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2022-01-18 05:05:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:06,508 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2022-01-18 05:05:06,508 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 05:05:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2022-01-18 05:05:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:06,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:06,508 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:06,525 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 05:05:06,709 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 05:05:06,709 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1981127550, now seen corresponding path program 376 times [2022-01-18 05:05:06,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:06,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035294500] [2022-01-18 05:05:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:06,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:06,789 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 05:05:06,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035294500] [2022-01-18 05:05:06,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035294500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364908560] [2022-01-18 05:05:06,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:06,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:06,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:06,790 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 05:05:06,790 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 05:05:06,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:07,097 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 57 treesize of output 45 [2022-01-18 05:05:07,178 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 05:05:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:07,326 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:07,326 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 24 treesize of output 19 [2022-01-18 05:05:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:07,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364908560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:07,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:07,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:05:07,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494218908] [2022-01-18 05:05:07,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:07,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:07,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:07,331 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 05:05:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:07,860 INFO L93 Difference]: Finished difference Result 554 states and 1556 transitions. [2022-01-18 05:05:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:07,860 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 05:05:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:07,861 INFO L225 Difference]: With dead ends: 554 [2022-01-18 05:05:07,861 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 05:05:07,861 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 05:05:07,861 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 05:05:07,862 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 05:05:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 05:05:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 301. [2022-01-18 05:05:07,865 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 05:05:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2022-01-18 05:05:07,865 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2022-01-18 05:05:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:07,866 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2022-01-18 05:05:07,866 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 05:05:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2022-01-18 05:05:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:07,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:07,866 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:07,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:08,066 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 05:05:08,066 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash -952346098, now seen corresponding path program 377 times [2022-01-18 05:05:08,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988959904] [2022-01-18 05:05:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:08,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:08,153 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 05:05:08,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988959904] [2022-01-18 05:05:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988959904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175704444] [2022-01-18 05:05:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:08,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:08,154 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 05:05:08,154 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 05:05:08,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:08,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:08,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:08,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:08,720 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:08,720 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 05:05:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175704444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:08,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815366047] [2022-01-18 05:05:08,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:08,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:08,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:08,725 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 05:05:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:09,113 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2022-01-18 05:05:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:09,113 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 05:05:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:09,114 INFO L225 Difference]: With dead ends: 508 [2022-01-18 05:05:09,114 INFO L226 Difference]: Without dead ends: 508 [2022-01-18 05:05:09,114 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 05:05:09,114 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 05:05:09,114 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 05:05:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-18 05:05:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2022-01-18 05:05:09,118 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 05:05:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2022-01-18 05:05:09,118 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2022-01-18 05:05:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:09,118 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2022-01-18 05:05:09,118 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 05:05:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2022-01-18 05:05:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:09,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:09,119 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:09,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-01-18 05:05:09,319 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 05:05:09,319 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash 42029522, now seen corresponding path program 378 times [2022-01-18 05:05:09,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:09,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098678294] [2022-01-18 05:05:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:09,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:09,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098678294] [2022-01-18 05:05:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098678294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809159971] [2022-01-18 05:05:09,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:09,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:09,407 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 05:05:09,407 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 05:05:09,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:05:09,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:09,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:09,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:09,976 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:09,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:09,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809159971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:09,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:09,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:09,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672138667] [2022-01-18 05:05:09,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:09,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:09,981 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 05:05:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:10,455 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2022-01-18 05:05:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:10,456 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 05:05:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:10,457 INFO L225 Difference]: With dead ends: 502 [2022-01-18 05:05:10,457 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 05:05:10,457 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 05:05:10,457 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 05:05:10,457 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 05:05:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 05:05:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2022-01-18 05:05:10,460 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 05:05:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2022-01-18 05:05:10,461 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2022-01-18 05:05:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:10,461 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2022-01-18 05:05:10,461 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 05:05:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2022-01-18 05:05:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:10,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:10,461 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 05:05:10,478 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 05:05:10,662 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 05:05:10,662 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -253397660, now seen corresponding path program 379 times [2022-01-18 05:05:10,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125122717] [2022-01-18 05:05:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:10,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:10,745 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 05:05:10,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125122717] [2022-01-18 05:05:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125122717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177973561] [2022-01-18 05:05:10,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:10,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:10,747 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 05:05:10,747 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 05:05:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:11,123 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 05:05:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:11,295 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:11,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:11,299 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 05:05:11,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177973561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:11,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:11,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:11,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094651932] [2022-01-18 05:05:11,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:11,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:11,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:11,300 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 05:05:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:11,618 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2022-01-18 05:05:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:11,618 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 05:05:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:11,619 INFO L225 Difference]: With dead ends: 463 [2022-01-18 05:05:11,619 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 05:05:11,619 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 05:05:11,619 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 05:05:11,619 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 05:05:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 05:05:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2022-01-18 05:05:11,622 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 05:05:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2022-01-18 05:05:11,623 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2022-01-18 05:05:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:11,623 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2022-01-18 05:05:11,623 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 05:05:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2022-01-18 05:05:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:11,623 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 05:05:11,640 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 05:05:11,823 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 05:05:11,824 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1089945976, now seen corresponding path program 380 times [2022-01-18 05:05:11,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:11,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207793283] [2022-01-18 05:05:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:11,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:11,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207793283] [2022-01-18 05:05:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207793283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697504509] [2022-01-18 05:05:11,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:11,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:11,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:11,900 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 05:05:11,901 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 05:05:12,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:12,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:12,224 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 54 treesize of output 42 [2022-01-18 05:05:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:12,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:12,396 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:12,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697504509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:12,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:05:12,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142177244] [2022-01-18 05:05:12,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:12,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:05:12,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:05:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:05:12,401 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 05:05:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:12,672 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2022-01-18 05:05:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:12,672 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 05:05:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:12,673 INFO L225 Difference]: With dead ends: 478 [2022-01-18 05:05:12,673 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:05:12,673 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 05:05:12,673 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 05:05:12,673 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 05:05:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:05:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2022-01-18 05:05:12,676 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 05:05:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 05:05:12,677 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 05:05:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:12,677 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 05:05:12,677 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 05:05:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 05:05:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:12,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:12,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:12,694 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 05:05:12,878 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 05:05:12,878 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1066046062, now seen corresponding path program 381 times [2022-01-18 05:05:12,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329351066] [2022-01-18 05:05:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:12,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:12,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329351066] [2022-01-18 05:05:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329351066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123363406] [2022-01-18 05:05:12,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:12,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:12,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:12,963 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 05:05:12,963 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 05:05:13,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:05:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:13,298 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 54 treesize of output 42 [2022-01-18 05:05:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:13,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:13,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:13,513 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 24 treesize of output 19 [2022-01-18 05:05:13,517 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 05:05:13,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123363406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:13,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:13,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:13,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227068281] [2022-01-18 05:05:13,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:13,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:13,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:13,521 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 05:05:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:13,905 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2022-01-18 05:05:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:13,906 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 05:05:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:13,906 INFO L225 Difference]: With dead ends: 484 [2022-01-18 05:05:13,906 INFO L226 Difference]: Without dead ends: 484 [2022-01-18 05:05:13,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:05:13,907 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 05:05:13,907 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 05:05:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-18 05:05:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2022-01-18 05:05:13,910 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 05:05:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2022-01-18 05:05:13,910 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2022-01-18 05:05:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:13,911 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2022-01-18 05:05:13,911 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 05:05:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2022-01-18 05:05:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:13,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:13,913 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:13,929 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 05:05:14,114 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 05:05:14,115 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 417088876, now seen corresponding path program 382 times [2022-01-18 05:05:14,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817817790] [2022-01-18 05:05:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:14,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:14,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:14,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817817790] [2022-01-18 05:05:14,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817817790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:14,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140040761] [2022-01-18 05:05:14,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:14,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:14,196 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 05:05:14,196 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 05:05:14,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:14,555 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 05:05:14,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:14,708 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:14,708 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 24 treesize of output 19 [2022-01-18 05:05:14,712 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 05:05:14,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140040761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:14,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:14,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:14,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488729675] [2022-01-18 05:05:14,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:14,713 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 05:05:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:15,048 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2022-01-18 05:05:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:15,048 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 05:05:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:15,049 INFO L225 Difference]: With dead ends: 459 [2022-01-18 05:05:15,049 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 05:05:15,049 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 05:05:15,049 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 05:05:15,049 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 05:05:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 05:05:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2022-01-18 05:05:15,052 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 05:05:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2022-01-18 05:05:15,053 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2022-01-18 05:05:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:15,053 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2022-01-18 05:05:15,053 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 05:05:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2022-01-18 05:05:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:15,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:15,054 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:15,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-01-18 05:05:15,259 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 05:05:15,259 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2013124188, now seen corresponding path program 383 times [2022-01-18 05:05:15,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192571938] [2022-01-18 05:05:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:15,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:15,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192571938] [2022-01-18 05:05:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192571938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154004657] [2022-01-18 05:05:15,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:15,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:15,340 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 05:05:15,341 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 05:05:15,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:15,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:15,682 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 27 treesize of output 21 [2022-01-18 05:05:15,735 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 05:05:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:15,907 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:15,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:15,911 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 05:05:15,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154004657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:15,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:15,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575783419] [2022-01-18 05:05:15,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:15,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:15,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:15,912 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 05:05:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:16,280 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2022-01-18 05:05:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:16,280 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 05:05:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:16,281 INFO L225 Difference]: With dead ends: 556 [2022-01-18 05:05:16,281 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 05:05:16,281 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 05:05:16,281 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 05:05:16,282 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 05:05:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 05:05:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2022-01-18 05:05:16,285 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 05:05:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2022-01-18 05:05:16,286 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2022-01-18 05:05:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:16,286 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2022-01-18 05:05:16,286 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 05:05:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2022-01-18 05:05:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:16,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:16,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:16,303 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 05:05:16,486 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 05:05:16,487 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:16,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:16,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1018748568, now seen corresponding path program 384 times [2022-01-18 05:05:16,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:16,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786638123] [2022-01-18 05:05:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:16,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:16,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786638123] [2022-01-18 05:05:16,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786638123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:16,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853648839] [2022-01-18 05:05:16,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:16,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:16,566 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 05:05:16,567 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 05:05:16,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:05:16,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:16,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:16,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:16,949 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 05:05:16,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:17,112 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:17,113 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 05:05:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:17,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853648839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:17,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:17,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:05:17,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403860627] [2022-01-18 05:05:17,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:17,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:17,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:17,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:17,117 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 05:05:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:17,443 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2022-01-18 05:05:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:17,444 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 05:05:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:17,444 INFO L225 Difference]: With dead ends: 558 [2022-01-18 05:05:17,444 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 05:05:17,444 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 05:05:17,445 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:05:17,445 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 05:05:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 05:05:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2022-01-18 05:05:17,448 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 05:05:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2022-01-18 05:05:17,449 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2022-01-18 05:05:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2022-01-18 05:05:17,449 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 05:05:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2022-01-18 05:05:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:17,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:17,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:17,466 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 05:05:17,651 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 05:05:17,651 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1314175750, now seen corresponding path program 385 times [2022-01-18 05:05:17,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:17,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611353366] [2022-01-18 05:05:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:17,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:17,723 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 05:05:17,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611353366] [2022-01-18 05:05:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611353366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267410228] [2022-01-18 05:05:17,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:17,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:17,724 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 05:05:17,724 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 05:05:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:18,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:18,261 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:18,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:18,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267410228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:18,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:18,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:18,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902746055] [2022-01-18 05:05:18,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:18,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:18,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:18,266 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 05:05:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:18,611 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2022-01-18 05:05:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:18,611 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 05:05:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:18,612 INFO L225 Difference]: With dead ends: 509 [2022-01-18 05:05:18,612 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 05:05:18,612 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 05:05:18,612 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 05:05:18,612 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 05:05:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 05:05:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2022-01-18 05:05:18,616 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 05:05:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2022-01-18 05:05:18,616 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2022-01-18 05:05:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:18,616 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2022-01-18 05:05:18,616 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 05:05:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2022-01-18 05:05:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:18,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:18,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:18,634 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 05:05:18,817 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 05:05:18,817 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2076262804, now seen corresponding path program 386 times [2022-01-18 05:05:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721086638] [2022-01-18 05:05:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:18,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:18,882 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 05:05:18,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:18,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721086638] [2022-01-18 05:05:18,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721086638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:18,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401664346] [2022-01-18 05:05:18,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:18,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:18,884 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 05:05:18,884 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 05:05:19,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:19,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:19,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:19,394 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:19,394 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 24 treesize of output 19 [2022-01-18 05:05:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:19,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401664346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:19,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:05:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32381347] [2022-01-18 05:05:19,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:19,399 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 05:05:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:19,703 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2022-01-18 05:05:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:19,704 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 05:05:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:19,704 INFO L225 Difference]: With dead ends: 544 [2022-01-18 05:05:19,704 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 05:05:19,704 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 05:05:19,705 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 05:05:19,705 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 05:05:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 05:05:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2022-01-18 05:05:19,708 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 05:05:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2022-01-18 05:05:19,708 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2022-01-18 05:05:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:19,708 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2022-01-18 05:05:19,708 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 05:05:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2022-01-18 05:05:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:19,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:19,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:19,726 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 05:05:19,909 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 05:05:19,909 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1083465140, now seen corresponding path program 387 times [2022-01-18 05:05:19,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431648705] [2022-01-18 05:05:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:19,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:19,977 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 05:05:19,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431648705] [2022-01-18 05:05:19,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431648705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553959661] [2022-01-18 05:05:19,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:19,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:19,979 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 05:05:19,979 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 05:05:20,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:05:20,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:20,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:20,333 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 05:05:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:20,443 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:20,443 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 24 treesize of output 19 [2022-01-18 05:05:20,447 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 05:05:20,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553959661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:20,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:05:20,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731943132] [2022-01-18 05:05:20,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:05:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:05:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:05:20,448 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 05:05:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:20,678 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2022-01-18 05:05:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:20,678 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 05:05:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:20,678 INFO L225 Difference]: With dead ends: 442 [2022-01-18 05:05:20,679 INFO L226 Difference]: Without dead ends: 436 [2022-01-18 05:05:20,679 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 05:05:20,679 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 05:05:20,679 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 05:05:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-18 05:05:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2022-01-18 05:05:20,682 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 05:05:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2022-01-18 05:05:20,683 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2022-01-18 05:05:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:20,683 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2022-01-18 05:05:20,683 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 05:05:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2022-01-18 05:05:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:20,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:20,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:20,699 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 05:05:20,883 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 05:05:20,884 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1107365054, now seen corresponding path program 388 times [2022-01-18 05:05:20,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024875859] [2022-01-18 05:05:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:20,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:20,953 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 05:05:20,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024875859] [2022-01-18 05:05:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024875859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104633394] [2022-01-18 05:05:20,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:20,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:20,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:20,955 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 05:05:20,955 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 05:05:21,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:21,265 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 54 treesize of output 42 [2022-01-18 05:05:21,314 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 05:05:21,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:21,447 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:21,447 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 24 treesize of output 19 [2022-01-18 05:05:21,451 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 05:05:21,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104633394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:21,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:21,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:05:21,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591519654] [2022-01-18 05:05:21,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:21,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:05:21,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:21,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:05:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:05:21,452 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 05:05:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:21,794 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2022-01-18 05:05:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:21,794 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 05:05:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:21,795 INFO L225 Difference]: With dead ends: 448 [2022-01-18 05:05:21,795 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 05:05:21,795 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 05:05:21,795 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 05:05:21,795 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 05:05:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 05:05:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2022-01-18 05:05:21,798 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 05:05:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2022-01-18 05:05:21,798 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2022-01-18 05:05:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2022-01-18 05:05:21,799 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 05:05:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2022-01-18 05:05:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:21,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:21,799 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 05:05:21,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-01-18 05:05:21,999 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 05:05:21,999 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1704467304, now seen corresponding path program 389 times [2022-01-18 05:05:22,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293406320] [2022-01-18 05:05:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:22,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:22,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293406320] [2022-01-18 05:05:22,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293406320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702397636] [2022-01-18 05:05:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:22,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:22,090 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 05:05:22,090 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 05:05:22,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:22,452 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 05:05:22,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:22,587 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:22,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:22,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702397636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:22,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:22,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:05:22,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576384134] [2022-01-18 05:05:22,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:22,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:22,592 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 05:05:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:22,901 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2022-01-18 05:05:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:22,902 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 05:05:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:22,902 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:05:22,902 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 05:05:22,902 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 05:05:22,902 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 05:05:22,903 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 05:05:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 05:05:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2022-01-18 05:05:22,906 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 05:05:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2022-01-18 05:05:22,906 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2022-01-18 05:05:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:22,906 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2022-01-18 05:05:22,906 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 05:05:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2022-01-18 05:05:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:22,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:22,907 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 05:05:22,923 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 05:05:23,107 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 05:05:23,107 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 478071362, now seen corresponding path program 390 times [2022-01-18 05:05:23,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:23,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599777999] [2022-01-18 05:05:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:23,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:23,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599777999] [2022-01-18 05:05:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599777999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618228152] [2022-01-18 05:05:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:23,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:23,174 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 05:05:23,175 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 05:05:23,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:23,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:23,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:23,500 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 05:05:23,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:23,613 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:05:23,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:23,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618228152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:23,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:23,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 05:05:23,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857926305] [2022-01-18 05:05:23,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:23,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:05:23,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:05:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:05:23,618 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 05:05:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:23,849 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2022-01-18 05:05:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:23,849 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 05:05:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:23,849 INFO L225 Difference]: With dead ends: 456 [2022-01-18 05:05:23,850 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 05:05:23,850 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 05:05:23,850 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 05:05:23,850 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 05:05:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 05:05:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2022-01-18 05:05:23,853 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 05:05:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2022-01-18 05:05:23,853 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2022-01-18 05:05:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2022-01-18 05:05:23,853 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 05:05:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2022-01-18 05:05:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:23,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:23,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:23,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:24,054 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 05:05:24,054 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -222241218, now seen corresponding path program 391 times [2022-01-18 05:05:24,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:24,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964381764] [2022-01-18 05:05:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:24,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:24,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964381764] [2022-01-18 05:05:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964381764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426645422] [2022-01-18 05:05:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:24,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:24,159 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 05:05:24,160 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 05:05:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:24,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:24,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:24,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:24,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:05:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:24,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426645422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:24,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:24,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:24,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308091416] [2022-01-18 05:05:24,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:24,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:24,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:24,887 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 05:05:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:25,347 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2022-01-18 05:05:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:25,347 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 05:05:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:25,347 INFO L225 Difference]: With dead ends: 369 [2022-01-18 05:05:25,347 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 05:05:25,348 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 05:05:25,348 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 05:05:25,348 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 05:05:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 05:05:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2022-01-18 05:05:25,351 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 05:05:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2022-01-18 05:05:25,351 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2022-01-18 05:05:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2022-01-18 05:05:25,351 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 05:05:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2022-01-18 05:05:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:25,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:25,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:25,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-01-18 05:05:25,552 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 05:05:25,552 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash 659836216, now seen corresponding path program 392 times [2022-01-18 05:05:25,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:25,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072680475] [2022-01-18 05:05:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:25,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:25,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072680475] [2022-01-18 05:05:25,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072680475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652112960] [2022-01-18 05:05:25,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:25,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:25,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:25,653 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 05:05:25,653 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 05:05:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:25,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:26,120 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 72 treesize of output 56 [2022-01-18 05:05:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:26,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:26,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:26,300 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 49 treesize of output 45 [2022-01-18 05:05:26,414 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 05:05:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652112960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:26,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:26,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:26,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287829135] [2022-01-18 05:05:26,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:26,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:26,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:26,415 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 05:05:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:26,867 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2022-01-18 05:05:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:26,867 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 05:05:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:26,868 INFO L225 Difference]: With dead ends: 375 [2022-01-18 05:05:26,868 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 05:05:26,868 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 05:05:26,868 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 05:05:26,868 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 05:05:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 05:05:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2022-01-18 05:05:26,871 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 05:05:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2022-01-18 05:05:26,872 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2022-01-18 05:05:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:26,872 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2022-01-18 05:05:26,872 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 05:05:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2022-01-18 05:05:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:26,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:26,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:26,889 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 05:05:27,073 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 05:05:27,073 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash 124606414, now seen corresponding path program 393 times [2022-01-18 05:05:27,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:27,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062807222] [2022-01-18 05:05:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:27,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:27,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062807222] [2022-01-18 05:05:27,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062807222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:27,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331075693] [2022-01-18 05:05:27,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:27,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:27,155 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 05:05:27,156 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 05:05:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:05:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:27,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:27,652 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 05:05:27,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:27,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:27,744 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 05:05:27,852 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 05:05:27,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331075693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:27,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:27,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:05:27,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134810510] [2022-01-18 05:05:27,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:27,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:05:27,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:27,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:05:27,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:05:27,853 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 05:05:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:28,217 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2022-01-18 05:05:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:28,217 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 05:05:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:28,217 INFO L225 Difference]: With dead ends: 339 [2022-01-18 05:05:28,218 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 05:05:28,218 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 05:05:28,218 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 05:05:28,218 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 05:05:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 05:05:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2022-01-18 05:05:28,221 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 05:05:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2022-01-18 05:05:28,221 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2022-01-18 05:05:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:28,221 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2022-01-18 05:05:28,221 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 05:05:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2022-01-18 05:05:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:28,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:28,222 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 05:05:28,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Ended with exit code 0 [2022-01-18 05:05:28,422 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 05:05:28,422 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1270739656, now seen corresponding path program 394 times [2022-01-18 05:05:28,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:28,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665669185] [2022-01-18 05:05:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:28,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:28,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:28,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665669185] [2022-01-18 05:05:28,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665669185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:28,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785647130] [2022-01-18 05:05:28,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:28,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:28,526 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 05:05:28,527 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 05:05:28,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:28,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:28,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:28,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:29,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:29,169 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-01-18 05:05:29,291 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 05:05:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785647130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:29,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700454920] [2022-01-18 05:05:29,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:29,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:29,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:29,292 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 05:05:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:29,797 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2022-01-18 05:05:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:29,798 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 05:05:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:29,799 INFO L225 Difference]: With dead ends: 456 [2022-01-18 05:05:29,799 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 05:05:29,799 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 05:05:29,799 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 05:05:29,799 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 05:05:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 05:05:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2022-01-18 05:05:29,802 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 05:05:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2022-01-18 05:05:29,803 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2022-01-18 05:05:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:29,803 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2022-01-18 05:05:29,803 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 05:05:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2022-01-18 05:05:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:29,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:29,803 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 05:05:29,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-01-18 05:05:30,003 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 05:05:30,004 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:30,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2142150206, now seen corresponding path program 395 times [2022-01-18 05:05:30,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:30,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329752534] [2022-01-18 05:05:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:30,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:30,083 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 05:05:30,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:30,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329752534] [2022-01-18 05:05:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329752534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:30,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087062890] [2022-01-18 05:05:30,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:30,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:30,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:30,084 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 05:05:30,084 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 05:05:30,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:30,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:30,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:30,657 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 05:05:30,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:30,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:30,753 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 49 treesize of output 45 [2022-01-18 05:05:30,867 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 05:05:30,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087062890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:30,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:30,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:05:30,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797080942] [2022-01-18 05:05:30,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:30,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:30,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:30,868 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 05:05:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:31,392 INFO L93 Difference]: Finished difference Result 485 states and 1324 transitions. [2022-01-18 05:05:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:05:31,392 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 05:05:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:31,393 INFO L225 Difference]: With dead ends: 485 [2022-01-18 05:05:31,393 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 05:05:31,393 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 05:05:31,393 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 05:05:31,393 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 05:05:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 05:05:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 302. [2022-01-18 05:05:31,396 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 05:05:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2022-01-18 05:05:31,397 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2022-01-18 05:05:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2022-01-18 05:05:31,397 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 05:05:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2022-01-18 05:05:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:31,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:31,397 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:31,414 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 05:05:31,597 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 05:05:31,598 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2011636990, now seen corresponding path program 396 times [2022-01-18 05:05:31,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:31,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555926176] [2022-01-18 05:05:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:31,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:31,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555926176] [2022-01-18 05:05:31,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555926176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:31,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241718750] [2022-01-18 05:05:31,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:31,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:31,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:31,711 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 05:05:31,712 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 05:05:31,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:31,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:32,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:32,229 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 05:05:32,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:32,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:32,347 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 45 [2022-01-18 05:05:32,459 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 05:05:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241718750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:32,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:32,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819920071] [2022-01-18 05:05:32,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:32,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:32,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:32,460 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 05:05:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:32,956 INFO L93 Difference]: Finished difference Result 453 states and 1265 transitions. [2022-01-18 05:05:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:32,957 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 05:05:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:32,957 INFO L225 Difference]: With dead ends: 453 [2022-01-18 05:05:32,957 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 05:05:32,958 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 05:05:32,958 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 05:05:32,958 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 05:05:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 05:05:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 295. [2022-01-18 05:05:32,961 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 05:05:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2022-01-18 05:05:32,961 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2022-01-18 05:05:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:32,961 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2022-01-18 05:05:32,961 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 05:05:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2022-01-18 05:05:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:32,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:32,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:32,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-01-18 05:05:33,162 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 05:05:33,162 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:33,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1288954686, now seen corresponding path program 397 times [2022-01-18 05:05:33,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:33,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690389287] [2022-01-18 05:05:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:33,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:33,275 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 05:05:33,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690389287] [2022-01-18 05:05:33,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690389287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039761009] [2022-01-18 05:05:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:33,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:33,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:33,276 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 05:05:33,277 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 05:05:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:33,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:33,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:33,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:33,903 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 49 treesize of output 45 [2022-01-18 05:05:34,025 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 05:05:34,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039761009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:34,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:34,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:34,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82877477] [2022-01-18 05:05:34,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:34,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:34,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:34,026 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 05:05:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:34,512 INFO L93 Difference]: Finished difference Result 420 states and 1188 transitions. [2022-01-18 05:05:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:34,512 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 05:05:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:34,513 INFO L225 Difference]: With dead ends: 420 [2022-01-18 05:05:34,513 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 05:05:34,513 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 05:05:34,513 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 05:05:34,513 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 05:05:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 05:05:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 292. [2022-01-18 05:05:34,516 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 05:05:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2022-01-18 05:05:34,516 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2022-01-18 05:05:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:34,517 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2022-01-18 05:05:34,517 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 05:05:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2022-01-18 05:05:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:34,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:34,517 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:34,533 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 05:05:34,717 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 05:05:34,718 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -308501554, now seen corresponding path program 398 times [2022-01-18 05:05:34,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:34,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060329372] [2022-01-18 05:05:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:34,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:34,799 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 05:05:34,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060329372] [2022-01-18 05:05:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060329372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287518712] [2022-01-18 05:05:34,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:34,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:34,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:34,800 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 05:05:34,801 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 05:05:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:35,247 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 105 treesize of output 83 [2022-01-18 05:05:35,361 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 05:05:35,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:35,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:35,447 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 05:05:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287518712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:35,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:05:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737928868] [2022-01-18 05:05:35,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:35,563 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 05:05:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:36,021 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2022-01-18 05:05:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:36,021 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 05:05:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:36,022 INFO L225 Difference]: With dead ends: 424 [2022-01-18 05:05:36,022 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 05:05:36,022 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 05:05:36,022 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 05:05:36,022 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 05:05:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 05:05:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2022-01-18 05:05:36,025 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 05:05:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2022-01-18 05:05:36,025 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2022-01-18 05:05:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:36,026 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2022-01-18 05:05:36,026 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 05:05:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2022-01-18 05:05:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:36,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:36,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:36,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:36,226 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 05:05:36,226 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash -284601640, now seen corresponding path program 399 times [2022-01-18 05:05:36,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:36,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827556567] [2022-01-18 05:05:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:36,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:36,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827556567] [2022-01-18 05:05:36,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827556567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789208525] [2022-01-18 05:05:36,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:36,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:36,339 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 05:05:36,339 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 05:05:36,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:05:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:36,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:36,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:36,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:36,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:05:37,091 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 05:05:37,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789208525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:37,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:37,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:37,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894194121] [2022-01-18 05:05:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:37,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:37,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:37,092 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 05:05:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:37,590 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2022-01-18 05:05:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:37,590 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 05:05:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:37,591 INFO L225 Difference]: With dead ends: 401 [2022-01-18 05:05:37,591 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 05:05:37,591 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 05:05:37,591 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 05:05:37,591 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 05:05:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 05:05:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2022-01-18 05:05:37,594 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 05:05:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2022-01-18 05:05:37,595 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2022-01-18 05:05:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:37,595 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2022-01-18 05:05:37,595 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 05:05:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2022-01-18 05:05:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:37,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:37,595 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:37,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:37,795 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 05:05:37,795 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1133139778, now seen corresponding path program 400 times [2022-01-18 05:05:37,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772777768] [2022-01-18 05:05:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:37,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:37,993 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 05:05:37,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772777768] [2022-01-18 05:05:37,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772777768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:37,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377948489] [2022-01-18 05:05:37,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:37,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:37,994 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 05:05:37,994 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 05:05:38,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:38,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:38,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:38,476 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 05:05:38,502 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 05:05:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:38,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:38,593 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 05:05:38,707 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 05:05:38,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377948489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:38,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:38,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:38,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972940865] [2022-01-18 05:05:38,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:38,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:38,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:38,708 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 05:05:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:39,143 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2022-01-18 05:05:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:39,143 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 05:05:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:39,144 INFO L225 Difference]: With dead ends: 341 [2022-01-18 05:05:39,144 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 05:05:39,144 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 05:05:39,144 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 05:05:39,144 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 05:05:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 05:05:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2022-01-18 05:05:39,146 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 05:05:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2022-01-18 05:05:39,147 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2022-01-18 05:05:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:39,147 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2022-01-18 05:05:39,147 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 05:05:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2022-01-18 05:05:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:39,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:39,147 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 05:05:39,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:39,348 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 05:05:39,348 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1874037112, now seen corresponding path program 401 times [2022-01-18 05:05:39,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625600978] [2022-01-18 05:05:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:39,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:39,452 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 05:05:39,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625600978] [2022-01-18 05:05:39,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625600978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294684106] [2022-01-18 05:05:39,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:39,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:39,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:39,453 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 05:05:39,454 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 05:05:39,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:39,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:39,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:40,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:40,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:05:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:40,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294684106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:40,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:40,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:40,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424514369] [2022-01-18 05:05:40,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:40,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:40,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:40,158 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 05:05:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:40,641 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2022-01-18 05:05:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:40,642 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 05:05:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:40,642 INFO L225 Difference]: With dead ends: 366 [2022-01-18 05:05:40,642 INFO L226 Difference]: Without dead ends: 360 [2022-01-18 05:05:40,642 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 05:05:40,643 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 05:05:40,643 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 05:05:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-18 05:05:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2022-01-18 05:05:40,646 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 05:05:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2022-01-18 05:05:40,646 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2022-01-18 05:05:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2022-01-18 05:05:40,646 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 05:05:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2022-01-18 05:05:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:40,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:40,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:40,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-01-18 05:05:40,847 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 05:05:40,847 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1897937026, now seen corresponding path program 402 times [2022-01-18 05:05:40,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177179741] [2022-01-18 05:05:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:40,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:40,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177179741] [2022-01-18 05:05:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177179741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:40,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315638640] [2022-01-18 05:05:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:40,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:40,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:40,960 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 05:05:40,960 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 05:05:41,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:41,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:41,423 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 75 treesize of output 59 [2022-01-18 05:05:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:41,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:41,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:05:41,712 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 05:05:41,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315638640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:41,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:41,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:41,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013841373] [2022-01-18 05:05:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:41,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:41,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:41,713 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 05:05:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:42,115 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2022-01-18 05:05:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:42,115 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 05:05:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:42,116 INFO L225 Difference]: With dead ends: 337 [2022-01-18 05:05:42,116 INFO L226 Difference]: Without dead ends: 337 [2022-01-18 05:05:42,116 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 05:05:42,116 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 05:05:42,116 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 05:05:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-18 05:05:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2022-01-18 05:05:42,119 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 05:05:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 05:05:42,119 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 05:05:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 05:05:42,119 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 05:05:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 05:05:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:42,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:42,120 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 05:05:42,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-01-18 05:05:42,323 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 05:05:42,323 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash 634272802, now seen corresponding path program 403 times [2022-01-18 05:05:42,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:42,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928001836] [2022-01-18 05:05:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:42,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:42,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928001836] [2022-01-18 05:05:42,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928001836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267921440] [2022-01-18 05:05:42,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:42,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:42,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:42,415 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 05:05:42,416 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 05:05:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:42,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:42,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:42,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:43,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:43,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:43,103 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 05:05:43,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267921440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:43,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:43,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:43,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765215397] [2022-01-18 05:05:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:43,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:43,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:43,104 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 05:05:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:43,457 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2022-01-18 05:05:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:43,458 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 05:05:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:43,458 INFO L225 Difference]: With dead ends: 414 [2022-01-18 05:05:43,458 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 05:05:43,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:05:43,459 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 05:05:43,459 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 05:05:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 05:05:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2022-01-18 05:05:43,462 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 05:05:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2022-01-18 05:05:43,462 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2022-01-18 05:05:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:43,463 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2022-01-18 05:05:43,463 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 05:05:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2022-01-18 05:05:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:43,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:43,463 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 05:05:43,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-01-18 05:05:43,663 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 05:05:43,664 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1516350236, now seen corresponding path program 404 times [2022-01-18 05:05:43,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89255681] [2022-01-18 05:05:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:43,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:43,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89255681] [2022-01-18 05:05:43,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89255681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730593088] [2022-01-18 05:05:43,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:43,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:43,764 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 05:05:43,764 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 05:05:43,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:44,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:44,234 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 05:05:44,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:44,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:44,384 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 05:05:44,444 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 05:05:44,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730593088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:44,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:44,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:44,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208357476] [2022-01-18 05:05:44,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:44,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:44,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:44,445 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 05:05:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:44,843 INFO L93 Difference]: Finished difference Result 443 states and 1235 transitions. [2022-01-18 05:05:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:44,843 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 05:05:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:44,844 INFO L225 Difference]: With dead ends: 443 [2022-01-18 05:05:44,844 INFO L226 Difference]: Without dead ends: 437 [2022-01-18 05:05:44,844 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 05:05:44,844 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 05:05:44,844 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 05:05:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-18 05:05:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 303. [2022-01-18 05:05:44,847 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 05:05:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 05:05:44,848 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 05:05:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 05:05:44,848 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 05:05:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 05:05:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:44,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:44,848 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 05:05:44,865 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 05:05:45,048 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 05:05:45,049 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1375170136, now seen corresponding path program 405 times [2022-01-18 05:05:45,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:45,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579852232] [2022-01-18 05:05:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:45,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:45,145 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 05:05:45,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:45,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579852232] [2022-01-18 05:05:45,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579852232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:45,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500989665] [2022-01-18 05:05:45,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:45,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:45,147 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 05:05:45,147 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 05:05:45,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:05:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:45,519 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 57 treesize of output 45 [2022-01-18 05:05:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:45,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:45,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:45,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:45,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500989665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:45,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:45,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:45,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135700744] [2022-01-18 05:05:45,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:45,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:45,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:45,839 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 05:05:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:46,321 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2022-01-18 05:05:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:46,321 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 05:05:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:46,322 INFO L225 Difference]: With dead ends: 472 [2022-01-18 05:05:46,322 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:05:46,322 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 05:05:46,322 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 05:05:46,322 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 05:05:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:05:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2022-01-18 05:05:46,325 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 05:05:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2022-01-18 05:05:46,326 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2022-01-18 05:05:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:46,326 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2022-01-18 05:05:46,326 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 05:05:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2022-01-18 05:05:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:46,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:46,327 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:46,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Forceful destruction successful, exit code 0 [2022-01-18 05:05:46,527 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 05:05:46,527 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1925421540, now seen corresponding path program 406 times [2022-01-18 05:05:46,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:46,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784075304] [2022-01-18 05:05:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:46,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:46,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784075304] [2022-01-18 05:05:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784075304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367934265] [2022-01-18 05:05:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:46,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:46,644 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 05:05:46,644 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 05:05:46,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:46,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:47,057 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 63 treesize of output 49 [2022-01-18 05:05:47,154 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 05:05:47,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:47,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:47,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:47,376 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 05:05:47,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367934265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:47,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:47,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:47,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715393801] [2022-01-18 05:05:47,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:47,377 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 05:05:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:47,902 INFO L93 Difference]: Finished difference Result 468 states and 1321 transitions. [2022-01-18 05:05:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:47,902 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 05:05:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:47,903 INFO L225 Difference]: With dead ends: 468 [2022-01-18 05:05:47,903 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 05:05:47,903 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 05:05:47,903 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 05:05:47,903 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 05:05:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 05:05:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 303. [2022-01-18 05:05:47,907 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 05:05:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 05:05:47,907 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 05:05:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:47,907 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 05:05:47,907 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 05:05:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 05:05:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:47,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:47,908 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 05:05:47,925 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 05:05:48,108 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 05:05:48,108 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash -944968408, now seen corresponding path program 407 times [2022-01-18 05:05:48,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583173836] [2022-01-18 05:05:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:48,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:48,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583173836] [2022-01-18 05:05:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583173836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121228037] [2022-01-18 05:05:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:48,186 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 05:05:48,187 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 05:05:48,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:48,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:48,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:48,572 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 57 treesize of output 45 [2022-01-18 05:05:48,639 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 05:05:48,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:48,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:48,762 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 05:05:48,822 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 05:05:48,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121228037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:48,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:05:48,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264073801] [2022-01-18 05:05:48,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:48,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:05:48,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:48,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:05:48,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:05:48,823 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 05:05:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:49,191 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2022-01-18 05:05:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:49,191 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 05:05:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:49,192 INFO L225 Difference]: With dead ends: 460 [2022-01-18 05:05:49,192 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 05:05:49,192 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 05:05:49,192 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:05:49,192 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 05:05:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 05:05:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2022-01-18 05:05:49,195 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 05:05:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2022-01-18 05:05:49,196 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2022-01-18 05:05:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2022-01-18 05:05:49,196 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 05:05:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2022-01-18 05:05:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:49,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:49,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:49,213 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 05:05:49,397 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 05:05:49,397 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash -921068494, now seen corresponding path program 408 times [2022-01-18 05:05:49,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:49,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105315412] [2022-01-18 05:05:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:49,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:49,498 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 05:05:49,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:49,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105315412] [2022-01-18 05:05:49,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105315412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:49,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311539943] [2022-01-18 05:05:49,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:49,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:49,499 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 05:05:49,500 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 05:05:49,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:49,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:49,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:49,976 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 05:05:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:50,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:50,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:50,167 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 05:05:50,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311539943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:50,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:50,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:05:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421226880] [2022-01-18 05:05:50,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:50,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:50,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:50,168 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 05:05:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:50,593 INFO L93 Difference]: Finished difference Result 466 states and 1305 transitions. [2022-01-18 05:05:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:05:50,594 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 05:05:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:50,594 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:05:50,594 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 05:05:50,595 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 05:05:50,595 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 05:05:50,595 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 05:05:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 05:05:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 304. [2022-01-18 05:05:50,598 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 05:05:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2022-01-18 05:05:50,598 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2022-01-18 05:05:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2022-01-18 05:05:50,599 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 05:05:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2022-01-18 05:05:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:50,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:50,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:50,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-01-18 05:05:50,799 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 05:05:50,799 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash 107712958, now seen corresponding path program 409 times [2022-01-18 05:05:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:50,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926891751] [2022-01-18 05:05:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:50,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:50,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926891751] [2022-01-18 05:05:50,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926891751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868206384] [2022-01-18 05:05:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:50,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:50,892 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 05:05:50,892 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 05:05:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:51,295 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 27 treesize of output 21 [2022-01-18 05:05:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:51,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:51,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:51,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:51,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868206384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:51,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:51,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:51,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603171121] [2022-01-18 05:05:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:51,559 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 05:05:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:51,880 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2022-01-18 05:05:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:51,880 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 05:05:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:51,880 INFO L225 Difference]: With dead ends: 396 [2022-01-18 05:05:51,880 INFO L226 Difference]: Without dead ends: 396 [2022-01-18 05:05:51,881 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 05:05:51,881 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 05:05:51,881 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 05:05:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-18 05:05:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2022-01-18 05:05:51,884 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 05:05:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2022-01-18 05:05:51,884 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2022-01-18 05:05:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:51,884 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2022-01-18 05:05:51,884 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 05:05:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2022-01-18 05:05:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:51,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:51,885 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:51,902 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 05:05:52,085 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 05:05:52,085 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:52,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1102088578, now seen corresponding path program 410 times [2022-01-18 05:05:52,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:52,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207670351] [2022-01-18 05:05:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:52,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:52,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:52,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207670351] [2022-01-18 05:05:52,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207670351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:52,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020691649] [2022-01-18 05:05:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:52,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:52,170 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 05:05:52,171 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 05:05:52,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:52,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:52,572 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 27 treesize of output 21 [2022-01-18 05:05:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:52,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:52,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:52,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:52,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020691649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:52,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:52,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:05:52,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101877867] [2022-01-18 05:05:52,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:52,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:52,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:52,828 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 05:05:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:53,278 INFO L93 Difference]: Finished difference Result 417 states and 1188 transitions. [2022-01-18 05:05:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:05:53,278 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 05:05:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:53,278 INFO L225 Difference]: With dead ends: 417 [2022-01-18 05:05:53,278 INFO L226 Difference]: Without dead ends: 417 [2022-01-18 05:05:53,279 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 05:05:53,279 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 05:05:53,279 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 05:05:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-18 05:05:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 294. [2022-01-18 05:05:53,282 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 05:05:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2022-01-18 05:05:53,282 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2022-01-18 05:05:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:53,282 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2022-01-18 05:05:53,282 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 05:05:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2022-01-18 05:05:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:53,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:53,283 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 05:05:53,299 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 05:05:53,483 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 05:05:53,483 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 806661396, now seen corresponding path program 411 times [2022-01-18 05:05:53,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:53,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137966234] [2022-01-18 05:05:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:53,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:53,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137966234] [2022-01-18 05:05:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137966234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628282309] [2022-01-18 05:05:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:05:53,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:53,566 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 05:05:53,566 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 05:05:53,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:05:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:54,015 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 05:05:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:54,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:54,155 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 05:05:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628282309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:54,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:54,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:05:54,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011994542] [2022-01-18 05:05:54,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:54,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:54,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:54,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:54,214 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 05:05:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:54,407 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2022-01-18 05:05:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:54,407 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 05:05:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:54,407 INFO L225 Difference]: With dead ends: 339 [2022-01-18 05:05:54,407 INFO L226 Difference]: Without dead ends: 339 [2022-01-18 05:05:54,408 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 05:05:54,408 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 05:05:54,408 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 05:05:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-18 05:05:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2022-01-18 05:05:54,410 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 05:05:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2022-01-18 05:05:54,411 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2022-01-18 05:05:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:54,411 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2022-01-18 05:05:54,411 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 05:05:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2022-01-18 05:05:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:54,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:54,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:54,429 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 05:05:54,612 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 05:05:54,612 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -29886920, now seen corresponding path program 412 times [2022-01-18 05:05:54,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:54,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969319993] [2022-01-18 05:05:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:54,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:54,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969319993] [2022-01-18 05:05:54,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969319993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280197676] [2022-01-18 05:05:54,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:05:54,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:54,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:54,699 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 05:05:54,699 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 05:05:54,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:05:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:55,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:05:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:55,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:55,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:55,284 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 05:05:55,343 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 05:05:55,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280197676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:55,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:55,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:05:55,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6656674] [2022-01-18 05:05:55,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:55,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:05:55,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:05:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:05:55,344 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 05:05:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:55,649 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2022-01-18 05:05:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:55,649 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 05:05:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:55,650 INFO L225 Difference]: With dead ends: 384 [2022-01-18 05:05:55,650 INFO L226 Difference]: Without dead ends: 378 [2022-01-18 05:05:55,650 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 05:05:55,650 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 05:05:55,650 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 05:05:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-18 05:05:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2022-01-18 05:05:55,653 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 05:05:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2022-01-18 05:05:55,653 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2022-01-18 05:05:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:55,653 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2022-01-18 05:05:55,653 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 05:05:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2022-01-18 05:05:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:55,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:55,654 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:55,671 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 05:05:55,854 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 05:05:55,854 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash -5987006, now seen corresponding path program 413 times [2022-01-18 05:05:55,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:55,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519148222] [2022-01-18 05:05:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:55,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:55,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519148222] [2022-01-18 05:05:55,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519148222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409024938] [2022-01-18 05:05:55,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:05:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:55,948 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 05:05:55,948 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 05:05:56,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:05:56,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:56,364 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 05:05:56,418 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 05:05:56,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:56,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:56,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:56,608 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 05:05:56,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409024938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:56,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:56,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:56,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58895462] [2022-01-18 05:05:56,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:56,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:56,609 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 05:05:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:56,953 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2022-01-18 05:05:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:05:56,954 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 05:05:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:56,954 INFO L225 Difference]: With dead ends: 390 [2022-01-18 05:05:56,954 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 05:05:56,954 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 05:05:56,954 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 05:05:56,954 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 05:05:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 05:05:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2022-01-18 05:05:56,957 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 05:05:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2022-01-18 05:05:56,958 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2022-01-18 05:05:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:56,958 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2022-01-18 05:05:56,958 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 05:05:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2022-01-18 05:05:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:56,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:56,958 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:56,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-01-18 05:05:57,159 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 05:05:57,159 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1477147932, now seen corresponding path program 414 times [2022-01-18 05:05:57,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:57,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172799980] [2022-01-18 05:05:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:57,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:57,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172799980] [2022-01-18 05:05:57,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172799980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292681310] [2022-01-18 05:05:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:05:57,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:57,247 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 05:05:57,247 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 05:05:57,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:05:57,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:57,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:57,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:05:57,879 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 05:05:57,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292681310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:57,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:57,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:05:57,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743375617] [2022-01-18 05:05:57,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:57,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:05:57,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:05:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:05:57,880 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 05:05:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:58,151 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2022-01-18 05:05:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:58,151 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 05:05:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:58,152 INFO L225 Difference]: With dead ends: 359 [2022-01-18 05:05:58,152 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 05:05:58,152 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 05:05:58,152 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 05:05:58,152 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 05:05:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 05:05:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2022-01-18 05:05:58,155 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 05:05:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 05:05:58,155 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 05:05:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:58,155 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 05:05:58,155 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 05:05:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 05:05:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:58,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:58,156 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 05:05:58,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-01-18 05:05:58,356 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 05:05:58,356 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:58,356 INFO L85 PathProgramCache]: Analyzing trace with hash -564105166, now seen corresponding path program 415 times [2022-01-18 05:05:58,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:58,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225792281] [2022-01-18 05:05:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:58,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:58,441 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 05:05:58,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225792281] [2022-01-18 05:05:58,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225792281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330176181] [2022-01-18 05:05:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:05:58,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:58,442 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 05:05:58,442 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 05:05:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:58,823 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 54 treesize of output 42 [2022-01-18 05:05:58,847 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 05:05:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:05:58,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:05:58,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:05:59,035 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 05:05:59,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330176181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:05:59,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:05:59,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:05:59,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481445402] [2022-01-18 05:05:59,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:05:59,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:05:59,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:05:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:05:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:05:59,035 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 05:05:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:05:59,311 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2022-01-18 05:05:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:05:59,311 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 05:05:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:05:59,312 INFO L225 Difference]: With dead ends: 331 [2022-01-18 05:05:59,312 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 05:05:59,312 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 05:05:59,312 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 05:05:59,312 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 05:05:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 05:05:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2022-01-18 05:05:59,315 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 05:05:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 05:05:59,315 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 05:05:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:05:59,315 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 05:05:59,315 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 05:05:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 05:05:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:05:59,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:05:59,316 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:05:59,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-01-18 05:05:59,516 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 05:05:59,516 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:05:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:05:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 176792168, now seen corresponding path program 416 times [2022-01-18 05:05:59,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:05:59,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087454519] [2022-01-18 05:05:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:05:59,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:05:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:05:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:05:59,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:05:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087454519] [2022-01-18 05:05:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087454519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:05:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747223820] [2022-01-18 05:05:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:05:59,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:05:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:05:59,614 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 05:05:59,615 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 05:05:59,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:05:59,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:05:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:05:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:05:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:00,052 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 05:06:00,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:00,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:00,114 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 49 treesize of output 45 [2022-01-18 05:06:00,239 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 05:06:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747223820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:00,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:00,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:06:00,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186015396] [2022-01-18 05:06:00,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:00,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:00,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:00,240 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 05:06:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:00,583 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2022-01-18 05:06:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:00,583 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 05:06:00,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:00,584 INFO L225 Difference]: With dead ends: 356 [2022-01-18 05:06:00,584 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 05:06:00,584 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 05:06:00,584 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 05:06:00,584 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 05:06:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 05:06:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2022-01-18 05:06:00,587 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 05:06:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2022-01-18 05:06:00,587 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2022-01-18 05:06:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:00,587 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2022-01-18 05:06:00,587 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 05:06:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2022-01-18 05:06:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:00,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:00,588 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:00,604 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 05:06:00,788 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 05:06:00,788 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 200692082, now seen corresponding path program 417 times [2022-01-18 05:06:00,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274588299] [2022-01-18 05:06:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:00,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:00,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:00,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274588299] [2022-01-18 05:06:00,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274588299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62874864] [2022-01-18 05:06:00,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:00,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:00,882 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 05:06:00,883 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 05:06:01,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:06:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:01,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:01,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:01,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:01,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:01,506 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 05:06:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62874864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:01,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552655069] [2022-01-18 05:06:01,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:01,507 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 05:06:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:01,799 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2022-01-18 05:06:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:01,799 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 05:06:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:01,800 INFO L225 Difference]: With dead ends: 327 [2022-01-18 05:06:01,800 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 05:06:01,800 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 05:06:01,800 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 05:06:01,800 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 05:06:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 05:06:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2022-01-18 05:06:01,802 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 05:06:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 05:06:01,803 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 05:06:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:01,803 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 05:06:01,803 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 05:06:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 05:06:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:01,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:01,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:01,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-01-18 05:06:02,004 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 05:06:02,004 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1090665010, now seen corresponding path program 418 times [2022-01-18 05:06:02,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151211639] [2022-01-18 05:06:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:02,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:02,108 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 05:06:02,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151211639] [2022-01-18 05:06:02,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151211639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92345293] [2022-01-18 05:06:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:02,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:02,110 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 05:06:02,110 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 05:06:02,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:02,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:02,514 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 05:06:02,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:02,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:02,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:02,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92345293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:02,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:02,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:02,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414320055] [2022-01-18 05:06:02,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:02,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:02,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:02,691 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 05:06:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:02,957 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2022-01-18 05:06:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:02,958 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 05:06:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:02,958 INFO L225 Difference]: With dead ends: 362 [2022-01-18 05:06:02,958 INFO L226 Difference]: Without dead ends: 356 [2022-01-18 05:06:02,958 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 05:06:02,958 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 05:06:02,958 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 05:06:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-18 05:06:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2022-01-18 05:06:02,968 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 05:06:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2022-01-18 05:06:02,968 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2022-01-18 05:06:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:02,968 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2022-01-18 05:06:02,968 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 05:06:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2022-01-18 05:06:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:02,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:02,969 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 05:06:02,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:03,169 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 05:06:03,169 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1066765096, now seen corresponding path program 419 times [2022-01-18 05:06:03,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755691024] [2022-01-18 05:06:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:03,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:03,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755691024] [2022-01-18 05:06:03,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755691024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793845837] [2022-01-18 05:06:03,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:03,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:03,288 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 05:06:03,289 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 05:06:03,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:03,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:03,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:03,632 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 05:06:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:03,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:03,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:03,853 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 05:06:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793845837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:03,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:03,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:03,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421854700] [2022-01-18 05:06:03,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:03,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:03,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:03,854 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 05:06:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:04,096 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2022-01-18 05:06:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:04,097 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 05:06:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:04,097 INFO L225 Difference]: With dead ends: 362 [2022-01-18 05:06:04,097 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 05:06:04,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:06:04,098 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 05:06:04,098 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 05:06:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 05:06:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2022-01-18 05:06:04,100 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 05:06:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2022-01-18 05:06:04,101 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2022-01-18 05:06:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:04,101 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2022-01-18 05:06:04,101 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 05:06:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2022-01-18 05:06:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:04,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:04,101 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 05:06:04,118 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 05:06:04,307 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 05:06:04,307 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash 416369842, now seen corresponding path program 420 times [2022-01-18 05:06:04,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:04,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185324149] [2022-01-18 05:06:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:04,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:04,397 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 05:06:04,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185324149] [2022-01-18 05:06:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185324149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:04,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146217867] [2022-01-18 05:06:04,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:04,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:04,398 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 05:06:04,399 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 05:06:04,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:04,754 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 05:06:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:04,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:04,845 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 27 treesize of output 27 [2022-01-18 05:06:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:04,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146217867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:04,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:04,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:06:04,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383479625] [2022-01-18 05:06:04,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:04,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:04,915 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 05:06:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:05,100 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2022-01-18 05:06:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:05,100 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 05:06:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:05,100 INFO L225 Difference]: With dead ends: 337 [2022-01-18 05:06:05,100 INFO L226 Difference]: Without dead ends: 337 [2022-01-18 05:06:05,101 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 05:06:05,101 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 05:06:05,101 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 05:06:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-18 05:06:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2022-01-18 05:06:05,103 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 05:06:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2022-01-18 05:06:05,104 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2022-01-18 05:06:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:05,104 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2022-01-18 05:06:05,104 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 05:06:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2022-01-18 05:06:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:05,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:05,104 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:05,121 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 05:06:05,304 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 05:06:05,305 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2109890380, now seen corresponding path program 421 times [2022-01-18 05:06:05,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:05,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939509698] [2022-01-18 05:06:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:05,394 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 05:06:05,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939509698] [2022-01-18 05:06:05,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939509698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704553722] [2022-01-18 05:06:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:05,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:05,396 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 05:06:05,396 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 05:06:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:05,785 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 57 treesize of output 45 [2022-01-18 05:06:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:05,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:06,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:06,057 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 24 treesize of output 24 [2022-01-18 05:06:06,087 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 05:06:06,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704553722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:06,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982728261] [2022-01-18 05:06:06,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:06,088 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 05:06:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:06,494 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2022-01-18 05:06:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:06,495 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 05:06:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:06,495 INFO L225 Difference]: With dead ends: 514 [2022-01-18 05:06:06,495 INFO L226 Difference]: Without dead ends: 514 [2022-01-18 05:06:06,495 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 05:06:06,496 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 05:06:06,496 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 05:06:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-18 05:06:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2022-01-18 05:06:06,499 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 05:06:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2022-01-18 05:06:06,499 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2022-01-18 05:06:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:06,499 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2022-01-18 05:06:06,500 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 05:06:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2022-01-18 05:06:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:06,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:06,500 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:06,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-01-18 05:06:06,700 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 05:06:06,700 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1302999482, now seen corresponding path program 422 times [2022-01-18 05:06:06,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:06,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060111423] [2022-01-18 05:06:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:06,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:06,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060111423] [2022-01-18 05:06:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060111423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973672254] [2022-01-18 05:06:06,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:06,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:06,793 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 05:06:06,793 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 05:06:07,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:07,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:07,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:07,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:07,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:07,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:07,448 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 05:06:07,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973672254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:07,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:07,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:07,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705151496] [2022-01-18 05:06:07,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:07,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:07,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:07,449 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 05:06:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:07,872 INFO L93 Difference]: Finished difference Result 543 states and 1525 transitions. [2022-01-18 05:06:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:07,872 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 05:06:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:07,873 INFO L225 Difference]: With dead ends: 543 [2022-01-18 05:06:07,873 INFO L226 Difference]: Without dead ends: 537 [2022-01-18 05:06:07,873 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 05:06:07,874 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 05:06:07,874 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 05:06:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-18 05:06:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 304. [2022-01-18 05:06:07,877 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 05:06:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2022-01-18 05:06:07,878 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2022-01-18 05:06:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:07,878 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2022-01-18 05:06:07,878 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 05:06:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2022-01-18 05:06:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:07,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:07,878 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:07,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:08,078 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 05:06:08,079 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:08,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1444179582, now seen corresponding path program 423 times [2022-01-18 05:06:08,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:08,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758969951] [2022-01-18 05:06:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:08,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:08,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758969951] [2022-01-18 05:06:08,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758969951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589872518] [2022-01-18 05:06:08,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:08,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:08,175 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 05:06:08,176 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 05:06:08,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:06:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:08,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:08,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:08,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:08,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:08,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589872518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:08,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:08,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:08,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272047827] [2022-01-18 05:06:08,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:08,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:08,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:08,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:08,909 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 05:06:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:09,494 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2022-01-18 05:06:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:09,495 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 05:06:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:09,495 INFO L225 Difference]: With dead ends: 572 [2022-01-18 05:06:09,495 INFO L226 Difference]: Without dead ends: 572 [2022-01-18 05:06:09,496 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 05:06:09,496 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 05:06:09,496 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 05:06:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-18 05:06:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2022-01-18 05:06:09,499 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 05:06:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2022-01-18 05:06:09,500 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2022-01-18 05:06:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:09,500 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2022-01-18 05:06:09,500 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 05:06:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2022-01-18 05:06:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:09,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:09,500 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:09,517 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 05:06:09,700 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 05:06:09,701 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash -449803962, now seen corresponding path program 424 times [2022-01-18 05:06:09,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734659379] [2022-01-18 05:06:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:09,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:09,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734659379] [2022-01-18 05:06:09,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734659379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908306284] [2022-01-18 05:06:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:09,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:09,786 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 05:06:09,787 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 05:06:10,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:10,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:10,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:10,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:10,419 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 24 treesize of output 24 [2022-01-18 05:06:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:10,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908306284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:10,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019431330] [2022-01-18 05:06:10,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:10,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:10,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:10,448 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 05:06:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:10,913 INFO L93 Difference]: Finished difference Result 568 states and 1611 transitions. [2022-01-18 05:06:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:06:10,914 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 05:06:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:10,914 INFO L225 Difference]: With dead ends: 568 [2022-01-18 05:06:10,915 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 05:06:10,915 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 05:06:10,915 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 05:06:10,915 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 05:06:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 05:06:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 304. [2022-01-18 05:06:10,918 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 05:06:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2022-01-18 05:06:10,919 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2022-01-18 05:06:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:10,919 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2022-01-18 05:06:10,919 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 05:06:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2022-01-18 05:06:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:10,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:10,919 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 05:06:10,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-01-18 05:06:11,120 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 05:06:11,120 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 530649170, now seen corresponding path program 425 times [2022-01-18 05:06:11,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181859214] [2022-01-18 05:06:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:11,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:11,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:11,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181859214] [2022-01-18 05:06:11,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181859214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:11,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251924056] [2022-01-18 05:06:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:11,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:11,219 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 05:06:11,220 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 05:06:11,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:11,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:11,698 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 05:06:11,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:11,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:11,850 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 24 treesize of output 24 [2022-01-18 05:06:11,885 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 05:06:11,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251924056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:11,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:11,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:11,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066093669] [2022-01-18 05:06:11,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:11,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:11,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:11,886 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 05:06:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:12,324 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2022-01-18 05:06:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:12,324 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 05:06:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:12,325 INFO L225 Difference]: With dead ends: 560 [2022-01-18 05:06:12,325 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 05:06:12,325 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 05:06:12,325 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 204 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:06:12,325 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 05:06:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 05:06:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2022-01-18 05:06:12,329 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 05:06:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2022-01-18 05:06:12,329 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2022-01-18 05:06:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:12,330 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2022-01-18 05:06:12,330 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 05:06:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2022-01-18 05:06:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:12,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:12,330 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 05:06:12,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-01-18 05:06:12,530 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 05:06:12,530 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 554549084, now seen corresponding path program 426 times [2022-01-18 05:06:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913814113] [2022-01-18 05:06:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:12,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:12,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:12,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913814113] [2022-01-18 05:06:12,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913814113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:12,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272108934] [2022-01-18 05:06:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:12,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:12,649 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 05:06:12,649 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 05:06:12,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:13,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:13,139 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 05:06:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:13,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:13,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:13,332 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 05:06:13,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272108934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:13,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:13,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:13,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774224260] [2022-01-18 05:06:13,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:13,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:13,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:13,333 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 05:06:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:13,859 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2022-01-18 05:06:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:13,859 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 05:06:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:13,860 INFO L225 Difference]: With dead ends: 543 [2022-01-18 05:06:13,860 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 05:06:13,860 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 05:06:13,860 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 05:06:13,860 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 05:06:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 05:06:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2022-01-18 05:06:13,863 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 05:06:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2022-01-18 05:06:13,864 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2022-01-18 05:06:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:13,864 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2022-01-18 05:06:13,864 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 05:06:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2022-01-18 05:06:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:13,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:13,865 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:13,881 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 05:06:14,065 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 05:06:14,065 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1583330536, now seen corresponding path program 427 times [2022-01-18 05:06:14,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708010019] [2022-01-18 05:06:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:14,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:14,155 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 05:06:14,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708010019] [2022-01-18 05:06:14,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708010019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2826485] [2022-01-18 05:06:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:14,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:14,157 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 05:06:14,157 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 05:06:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:14,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:14,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:14,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:14,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:14,835 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 05:06:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2826485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:14,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:14,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244209243] [2022-01-18 05:06:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:14,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:14,836 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 05:06:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:15,224 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2022-01-18 05:06:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:15,224 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 05:06:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:15,225 INFO L225 Difference]: With dead ends: 517 [2022-01-18 05:06:15,225 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 05:06:15,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:06:15,225 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 05:06:15,225 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 05:06:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 05:06:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2022-01-18 05:06:15,229 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 05:06:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2022-01-18 05:06:15,229 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2022-01-18 05:06:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:15,229 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2022-01-18 05:06:15,229 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 05:06:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2022-01-18 05:06:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:15,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:15,230 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:15,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:15,430 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 05:06:15,430 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1717261140, now seen corresponding path program 428 times [2022-01-18 05:06:15,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251277545] [2022-01-18 05:06:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:15,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:15,514 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 05:06:15,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:15,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251277545] [2022-01-18 05:06:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251277545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:15,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666431579] [2022-01-18 05:06:15,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:15,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:15,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:15,515 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 05:06:15,516 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 05:06:15,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:15,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:15,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:15,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:16,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:16,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666431579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:16,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:16,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153958258] [2022-01-18 05:06:16,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:16,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:16,166 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 05:06:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:16,608 INFO L93 Difference]: Finished difference Result 538 states and 1547 transitions. [2022-01-18 05:06:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:16,608 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 05:06:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:16,609 INFO L225 Difference]: With dead ends: 538 [2022-01-18 05:06:16,609 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 05:06:16,609 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 05:06:16,609 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 05:06:16,609 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 05:06:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 05:06:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 308. [2022-01-18 05:06:16,612 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 05:06:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2022-01-18 05:06:16,613 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2022-01-18 05:06:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:16,613 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2022-01-18 05:06:16,613 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 05:06:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2022-01-18 05:06:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:16,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:16,613 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 05:06:16,630 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 05:06:16,814 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 05:06:16,814 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2012688322, now seen corresponding path program 429 times [2022-01-18 05:06:16,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:16,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303853605] [2022-01-18 05:06:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:16,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:16,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:16,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303853605] [2022-01-18 05:06:16,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303853605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:16,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295749129] [2022-01-18 05:06:16,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:16,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:16,901 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 05:06:16,902 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 05:06:17,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:17,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:17,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:17,554 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 05:06:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295749129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:17,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:17,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:17,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998391746] [2022-01-18 05:06:17,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:17,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:17,555 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 05:06:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:17,887 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2022-01-18 05:06:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:17,887 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 05:06:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:17,888 INFO L225 Difference]: With dead ends: 460 [2022-01-18 05:06:17,888 INFO L226 Difference]: Without dead ends: 460 [2022-01-18 05:06:17,888 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 05:06:17,888 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 05:06:17,888 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 05:06:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-18 05:06:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2022-01-18 05:06:17,891 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 05:06:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2022-01-18 05:06:17,891 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2022-01-18 05:06:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:17,892 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2022-01-18 05:06:17,892 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 05:06:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2022-01-18 05:06:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:17,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:17,892 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:17,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:18,092 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 05:06:18,092 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1445730658, now seen corresponding path program 430 times [2022-01-18 05:06:18,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047188686] [2022-01-18 05:06:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:18,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:18,185 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 05:06:18,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047188686] [2022-01-18 05:06:18,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047188686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026090822] [2022-01-18 05:06:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:18,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:18,186 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 05:06:18,187 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 05:06:18,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:18,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:18,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:18,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:18,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:18,819 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 05:06:18,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026090822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:18,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:18,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:18,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099669263] [2022-01-18 05:06:18,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:18,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:18,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:18,820 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 05:06:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:19,178 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2022-01-18 05:06:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:19,179 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 05:06:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:19,179 INFO L225 Difference]: With dead ends: 499 [2022-01-18 05:06:19,179 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 05:06:19,179 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 05:06:19,180 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 05:06:19,180 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 05:06:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 05:06:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2022-01-18 05:06:19,183 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 05:06:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2022-01-18 05:06:19,183 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2022-01-18 05:06:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:19,184 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2022-01-18 05:06:19,184 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 05:06:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2022-01-18 05:06:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:19,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:19,184 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:19,200 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 05:06:19,384 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 05:06:19,384 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1469630572, now seen corresponding path program 431 times [2022-01-18 05:06:19,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:19,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90819265] [2022-01-18 05:06:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:19,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:19,463 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 05:06:19,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90819265] [2022-01-18 05:06:19,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90819265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222150472] [2022-01-18 05:06:19,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:19,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:19,464 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 05:06:19,465 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 05:06:19,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:19,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:19,919 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 05:06:19,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:20,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:20,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:20,091 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 05:06:20,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222150472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:20,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:20,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:20,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760070757] [2022-01-18 05:06:20,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:20,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:20,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:20,092 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 05:06:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:20,393 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2022-01-18 05:06:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:20,393 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 05:06:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:20,394 INFO L225 Difference]: With dead ends: 505 [2022-01-18 05:06:20,394 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 05:06:20,394 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 05:06:20,394 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 05:06:20,394 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 05:06:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 05:06:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2022-01-18 05:06:20,398 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 05:06:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2022-01-18 05:06:20,398 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2022-01-18 05:06:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:20,398 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2022-01-18 05:06:20,398 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 05:06:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2022-01-18 05:06:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:20,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:20,399 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 05:06:20,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:20,599 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 05:06:20,599 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1342201786, now seen corresponding path program 432 times [2022-01-18 05:06:20,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568133062] [2022-01-18 05:06:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:20,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:20,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:20,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568133062] [2022-01-18 05:06:20,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568133062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:20,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886849441] [2022-01-18 05:06:20,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:20,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:20,680 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 05:06:20,681 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 05:06:20,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:21,099 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 05:06:21,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:21,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:21,241 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 24 treesize of output 24 [2022-01-18 05:06:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:21,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886849441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:21,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:21,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:21,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496411665] [2022-01-18 05:06:21,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:21,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:21,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:21,271 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 05:06:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:21,501 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2022-01-18 05:06:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:21,501 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 05:06:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:21,501 INFO L225 Difference]: With dead ends: 480 [2022-01-18 05:06:21,502 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 05:06:21,502 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 05:06:21,502 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 05:06:21,502 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 05:06:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 05:06:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2022-01-18 05:06:21,505 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 05:06:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2022-01-18 05:06:21,506 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2022-01-18 05:06:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:21,506 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2022-01-18 05:06:21,506 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 05:06:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2022-01-18 05:06:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:21,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:21,506 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 05:06:21,523 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 05:06:21,706 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 05:06:21,706 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 522552446, now seen corresponding path program 433 times [2022-01-18 05:06:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791995003] [2022-01-18 05:06:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:21,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:21,790 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 05:06:21,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:21,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791995003] [2022-01-18 05:06:21,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791995003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:21,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356796312] [2022-01-18 05:06:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:21,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:21,791 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 05:06:21,792 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 05:06:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:22,231 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 62 treesize of output 48 [2022-01-18 05:06:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:22,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:22,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:22,458 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 24 treesize of output 24 [2022-01-18 05:06:22,488 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 05:06:22,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356796312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:22,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:22,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:22,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193389080] [2022-01-18 05:06:22,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:22,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:22,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:22,489 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 05:06:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:22,867 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2022-01-18 05:06:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:22,867 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 05:06:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:22,868 INFO L225 Difference]: With dead ends: 504 [2022-01-18 05:06:22,868 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 05:06:22,868 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 05:06:22,868 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 05:06:22,868 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 05:06:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 05:06:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2022-01-18 05:06:22,871 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 05:06:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2022-01-18 05:06:22,872 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2022-01-18 05:06:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:22,872 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2022-01-18 05:06:22,872 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 05:06:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2022-01-18 05:06:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:22,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:22,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:22,890 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 05:06:23,073 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 05:06:23,073 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1516928066, now seen corresponding path program 434 times [2022-01-18 05:06:23,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:23,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413493008] [2022-01-18 05:06:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:23,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:23,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413493008] [2022-01-18 05:06:23,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413493008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759993803] [2022-01-18 05:06:23,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:23,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:23,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:23,184 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 05:06:23,185 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 05:06:23,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:23,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:23,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:23,594 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 27 treesize of output 21 [2022-01-18 05:06:23,650 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 05:06:23,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:23,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:23,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:23,850 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 05:06:23,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759993803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:23,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:23,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-01-18 05:06:23,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185043244] [2022-01-18 05:06:23,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:23,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:23,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:23,851 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 05:06:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:24,268 INFO L93 Difference]: Finished difference Result 539 states and 1540 transitions. [2022-01-18 05:06:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:24,268 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 05:06:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:24,269 INFO L225 Difference]: With dead ends: 539 [2022-01-18 05:06:24,269 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 05:06:24,269 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 05:06:24,269 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 05:06:24,269 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 05:06:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 05:06:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 306. [2022-01-18 05:06:24,272 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 05:06:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2022-01-18 05:06:24,273 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2022-01-18 05:06:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:24,273 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2022-01-18 05:06:24,273 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 05:06:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2022-01-18 05:06:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:24,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:24,273 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 05:06:24,290 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 05:06:24,474 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 05:06:24,474 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1221500884, now seen corresponding path program 435 times [2022-01-18 05:06:24,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:24,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978692610] [2022-01-18 05:06:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:24,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:24,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978692610] [2022-01-18 05:06:24,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978692610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:24,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700378229] [2022-01-18 05:06:24,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:24,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:24,551 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 05:06:24,552 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 05:06:24,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:24,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:24,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:25,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:25,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:25,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700378229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:25,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:25,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:25,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748971932] [2022-01-18 05:06:25,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:25,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:25,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:25,178 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 05:06:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:25,360 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2022-01-18 05:06:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:25,360 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 05:06:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:25,361 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:06:25,361 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 05:06:25,361 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 05:06:25,361 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 05:06:25,361 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 05:06:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 05:06:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2022-01-18 05:06:25,364 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 05:06:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2022-01-18 05:06:25,365 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2022-01-18 05:06:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:25,365 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2022-01-18 05:06:25,365 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 05:06:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2022-01-18 05:06:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:25,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:25,366 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:25,382 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 05:06:25,566 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 05:06:25,566 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 459413830, now seen corresponding path program 436 times [2022-01-18 05:06:25,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:25,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985402348] [2022-01-18 05:06:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:25,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:25,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985402348] [2022-01-18 05:06:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985402348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922188505] [2022-01-18 05:06:25,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:25,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:25,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:25,639 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 05:06:25,639 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 05:06:25,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:26,072 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 05:06:26,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:26,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:26,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:26,249 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 05:06:26,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922188505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:26,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:26,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:26,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884740665] [2022-01-18 05:06:26,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:26,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:26,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:26,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:26,249 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 05:06:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:26,547 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2022-01-18 05:06:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:26,547 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 05:06:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:26,548 INFO L225 Difference]: With dead ends: 474 [2022-01-18 05:06:26,548 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 05:06:26,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:06:26,548 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 05:06:26,548 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 05:06:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 05:06:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2022-01-18 05:06:26,551 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 05:06:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2022-01-18 05:06:26,552 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2022-01-18 05:06:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:26,552 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2022-01-18 05:06:26,552 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 05:06:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2022-01-18 05:06:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:26,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:26,553 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:26,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-01-18 05:06:26,753 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 05:06:26,753 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:26,753 INFO L85 PathProgramCache]: Analyzing trace with hash -675825522, now seen corresponding path program 437 times [2022-01-18 05:06:26,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:26,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709456605] [2022-01-18 05:06:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:26,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:26,831 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 05:06:26,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709456605] [2022-01-18 05:06:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709456605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:26,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520815764] [2022-01-18 05:06:26,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:26,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:26,832 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 05:06:26,833 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 05:06:27,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:27,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:27,284 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 05:06:27,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:27,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:27,410 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 24 treesize of output 24 [2022-01-18 05:06:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:27,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520815764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:27,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:27,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:06:27,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935982944] [2022-01-18 05:06:27,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:27,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:27,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:27,441 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 05:06:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:27,793 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2022-01-18 05:06:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:27,793 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 05:06:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:27,794 INFO L225 Difference]: With dead ends: 539 [2022-01-18 05:06:27,794 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 05:06:27,794 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 05:06:27,794 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 05:06:27,794 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 05:06:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 05:06:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2022-01-18 05:06:27,797 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 05:06:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-01-18 05:06:27,798 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-01-18 05:06:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:27,798 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-01-18 05:06:27,798 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 05:06:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-01-18 05:06:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:27,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:27,798 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 05:06:27,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-01-18 05:06:27,999 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 05:06:27,999 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -651925608, now seen corresponding path program 438 times [2022-01-18 05:06:27,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644593752] [2022-01-18 05:06:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:27,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:28,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644593752] [2022-01-18 05:06:28,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644593752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678534746] [2022-01-18 05:06:28,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:28,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:28,084 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 05:06:28,085 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 05:06:28,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:28,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:28,491 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 54 treesize of output 42 [2022-01-18 05:06:28,546 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 05:06:28,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:28,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:28,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:28,712 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 05:06:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678534746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:28,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:28,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-01-18 05:06:28,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740567697] [2022-01-18 05:06:28,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:28,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:28,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:28,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:28,713 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 05:06:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:29,143 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2022-01-18 05:06:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:29,144 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 05:06:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:29,144 INFO L225 Difference]: With dead ends: 545 [2022-01-18 05:06:29,144 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 05:06:29,145 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 05:06:29,145 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 05:06:29,145 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 05:06:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 05:06:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2022-01-18 05:06:29,148 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 05:06:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2022-01-18 05:06:29,149 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2022-01-18 05:06:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:29,149 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2022-01-18 05:06:29,149 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 05:06:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2022-01-18 05:06:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:29,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:29,149 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 05:06:29,166 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 05:06:29,349 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 05:06:29,350 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash 831209330, now seen corresponding path program 439 times [2022-01-18 05:06:29,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:29,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695263656] [2022-01-18 05:06:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:29,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:29,420 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 05:06:29,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695263656] [2022-01-18 05:06:29,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695263656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:29,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310045717] [2022-01-18 05:06:29,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:29,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:29,422 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 05:06:29,422 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 05:06:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:29,828 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 05:06:29,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:29,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:29,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:29,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310045717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:29,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:29,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:06:29,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399955918] [2022-01-18 05:06:29,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:29,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:06:29,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:06:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:29,984 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 05:06:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:30,225 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2022-01-18 05:06:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:30,226 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 05:06:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:30,226 INFO L225 Difference]: With dead ends: 528 [2022-01-18 05:06:30,226 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 05:06:30,226 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 05:06:30,227 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 05:06:30,227 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 05:06:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 05:06:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2022-01-18 05:06:30,230 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 05:06:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2022-01-18 05:06:30,231 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2022-01-18 05:06:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:30,231 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2022-01-18 05:06:30,231 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 05:06:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2022-01-18 05:06:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:30,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:30,231 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:30,248 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 05:06:30,431 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 05:06:30,431 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1281219300, now seen corresponding path program 440 times [2022-01-18 05:06:30,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955015410] [2022-01-18 05:06:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:30,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:30,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955015410] [2022-01-18 05:06:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955015410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297807659] [2022-01-18 05:06:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:30,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:30,502 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 05:06:30,502 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 05:06:30,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:30,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:30,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:30,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:30,932 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 05:06:30,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:31,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:31,052 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 05:06:31,082 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 05:06:31,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297807659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:31,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:31,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 05:06:31,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762499588] [2022-01-18 05:06:31,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:31,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:31,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:31,082 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 05:06:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:31,432 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2022-01-18 05:06:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:31,433 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 05:06:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:31,433 INFO L225 Difference]: With dead ends: 553 [2022-01-18 05:06:31,433 INFO L226 Difference]: Without dead ends: 553 [2022-01-18 05:06:31,434 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 05:06:31,434 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 05:06:31,434 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 05:06:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-18 05:06:31,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2022-01-18 05:06:31,437 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 05:06:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2022-01-18 05:06:31,437 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2022-01-18 05:06:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:31,438 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2022-01-18 05:06:31,438 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 05:06:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2022-01-18 05:06:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:31,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:31,438 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 05:06:31,455 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 05:06:31,638 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 05:06:31,638 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:31,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1907837306, now seen corresponding path program 441 times [2022-01-18 05:06:31,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:31,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536627553] [2022-01-18 05:06:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:31,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:31,713 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 05:06:31,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536627553] [2022-01-18 05:06:31,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536627553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880803776] [2022-01-18 05:06:31,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:31,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:31,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:31,714 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 05:06:31,715 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 05:06:31,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:31,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:32,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:32,106 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 05:06:32,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:32,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:32,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:32,271 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 05:06:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880803776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:32,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-18 05:06:32,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546850185] [2022-01-18 05:06:32,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:32,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:06:32,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:06:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:32,272 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 05:06:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:32,538 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2022-01-18 05:06:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:32,539 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 05:06:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:32,539 INFO L225 Difference]: With dead ends: 328 [2022-01-18 05:06:32,539 INFO L226 Difference]: Without dead ends: 316 [2022-01-18 05:06:32,539 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 05:06:32,539 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 05:06:32,539 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 05:06:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-18 05:06:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2022-01-18 05:06:32,542 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 05:06:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2022-01-18 05:06:32,542 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2022-01-18 05:06:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:32,542 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2022-01-18 05:06:32,542 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 05:06:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2022-01-18 05:06:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:32,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:32,543 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:32,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-01-18 05:06:32,743 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 05:06:32,743 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1166939972, now seen corresponding path program 442 times [2022-01-18 05:06:32,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846348560] [2022-01-18 05:06:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:32,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:32,806 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 05:06:32,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:32,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846348560] [2022-01-18 05:06:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846348560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:32,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012331684] [2022-01-18 05:06:32,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:32,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:32,807 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 05:06:32,807 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 05:06:33,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:33,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:33,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:33,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:33,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:33,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:33,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:33,370 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 05:06:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012331684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:33,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:33,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:06:33,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803419970] [2022-01-18 05:06:33,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:33,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:33,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:33,370 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 05:06:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:33,595 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2022-01-18 05:06:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:33,595 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 05:06:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:33,595 INFO L225 Difference]: With dead ends: 353 [2022-01-18 05:06:33,595 INFO L226 Difference]: Without dead ends: 347 [2022-01-18 05:06:33,595 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 05:06:33,596 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 05:06:33,596 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 05:06:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-18 05:06:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2022-01-18 05:06:33,598 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 05:06:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2022-01-18 05:06:33,599 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2022-01-18 05:06:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:33,599 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2022-01-18 05:06:33,599 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 05:06:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2022-01-18 05:06:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:33,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:33,600 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 05:06:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:33,800 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 05:06:33,800 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1143040058, now seen corresponding path program 443 times [2022-01-18 05:06:33,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:33,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182057156] [2022-01-18 05:06:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:33,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:33,888 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 05:06:33,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182057156] [2022-01-18 05:06:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182057156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573729944] [2022-01-18 05:06:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:33,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:33,889 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 05:06:33,890 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 05:06:34,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:34,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:34,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:34,313 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 05:06:34,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:34,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:34,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:34,505 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 05:06:34,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573729944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:34,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:34,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:06:34,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226176577] [2022-01-18 05:06:34,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:34,506 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 05:06:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:34,730 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2022-01-18 05:06:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:34,730 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 05:06:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:34,730 INFO L225 Difference]: With dead ends: 324 [2022-01-18 05:06:34,730 INFO L226 Difference]: Without dead ends: 324 [2022-01-18 05:06:34,731 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 05:06:34,731 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 05:06:34,731 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 05:06:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-18 05:06:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2022-01-18 05:06:34,733 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 05:06:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2022-01-18 05:06:34,734 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2022-01-18 05:06:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:34,734 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2022-01-18 05:06:34,734 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 05:06:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2022-01-18 05:06:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:34,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:34,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:34,751 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 05:06:34,934 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 05:06:34,935 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1860570146, now seen corresponding path program 444 times [2022-01-18 05:06:34,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:34,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725945945] [2022-01-18 05:06:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:34,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:35,010 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 05:06:35,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725945945] [2022-01-18 05:06:35,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725945945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721465979] [2022-01-18 05:06:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:35,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:35,012 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 05:06:35,012 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 05:06:35,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:35,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:35,339 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 54 treesize of output 42 [2022-01-18 05:06:35,379 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 05:06:35,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:35,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:35,466 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 05:06:35,517 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 05:06:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721465979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:35,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:35,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:06:35,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66017322] [2022-01-18 05:06:35,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:35,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:35,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:35,518 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 05:06:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:35,677 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2022-01-18 05:06:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:35,677 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 05:06:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:35,678 INFO L225 Difference]: With dead ends: 359 [2022-01-18 05:06:35,678 INFO L226 Difference]: Without dead ends: 353 [2022-01-18 05:06:35,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:35,678 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 05:06:35,678 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 05:06:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-18 05:06:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2022-01-18 05:06:35,681 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 05:06:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2022-01-18 05:06:35,681 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2022-01-18 05:06:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:35,682 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2022-01-18 05:06:35,682 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 05:06:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2022-01-18 05:06:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:35,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:35,682 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 05:06:35,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:35,882 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 05:06:35,883 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1884470060, now seen corresponding path program 445 times [2022-01-18 05:06:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:35,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294352834] [2022-01-18 05:06:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:35,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:35,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294352834] [2022-01-18 05:06:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294352834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720755996] [2022-01-18 05:06:35,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:35,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:35,962 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 05:06:35,963 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 05:06:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:36,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:36,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:36,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:36,436 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 27 treesize of output 27 [2022-01-18 05:06:36,488 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 05:06:36,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720755996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:36,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:36,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:06:36,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147610121] [2022-01-18 05:06:36,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:36,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:36,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:36,489 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 05:06:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:36,729 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2022-01-18 05:06:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:36,729 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 05:06:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:36,730 INFO L225 Difference]: With dead ends: 359 [2022-01-18 05:06:36,730 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 05:06:36,730 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 05:06:36,730 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 05:06:36,730 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 05:06:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 05:06:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2022-01-18 05:06:36,733 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 05:06:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2022-01-18 05:06:36,734 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2022-01-18 05:06:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:36,734 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2022-01-18 05:06:36,734 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 05:06:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2022-01-18 05:06:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:36,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:36,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:36,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-01-18 05:06:36,934 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 05:06:36,935 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -927362298, now seen corresponding path program 446 times [2022-01-18 05:06:36,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:36,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813697549] [2022-01-18 05:06:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:36,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:37,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813697549] [2022-01-18 05:06:37,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813697549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570594041] [2022-01-18 05:06:37,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:37,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:37,007 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 05:06:37,007 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 05:06:37,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:37,364 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 05:06:37,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:37,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:37,466 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 05:06:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:37,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570594041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:37,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:37,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:06:37,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74855802] [2022-01-18 05:06:37,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:37,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:37,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:37,530 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 05:06:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:37,720 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2022-01-18 05:06:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:37,720 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 05:06:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:37,721 INFO L225 Difference]: With dead ends: 334 [2022-01-18 05:06:37,721 INFO L226 Difference]: Without dead ends: 334 [2022-01-18 05:06:37,721 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 05:06:37,721 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 05:06:37,721 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 05:06:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-18 05:06:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2022-01-18 05:06:37,724 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 05:06:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2022-01-18 05:06:37,727 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2022-01-18 05:06:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:37,728 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2022-01-18 05:06:37,728 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 05:06:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2022-01-18 05:06:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:37,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:37,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:37,745 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 05:06:37,941 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 05:06:37,941 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:37,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:37,941 INFO L85 PathProgramCache]: Analyzing trace with hash 799792056, now seen corresponding path program 447 times [2022-01-18 05:06:37,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:37,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610202393] [2022-01-18 05:06:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:37,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:38,000 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 05:06:38,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610202393] [2022-01-18 05:06:38,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610202393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114718768] [2022-01-18 05:06:38,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:38,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:38,001 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 05:06:38,001 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 05:06:38,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:06:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:38,325 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 54 treesize of output 42 [2022-01-18 05:06:38,365 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 05:06:38,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:38,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:38,458 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 24 treesize of output 24 [2022-01-18 05:06:38,489 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 05:06:38,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114718768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:38,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:38,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:06:38,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410524656] [2022-01-18 05:06:38,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:38,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:06:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:38,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:06:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:06:38,490 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 05:06:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:38,673 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2022-01-18 05:06:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:38,674 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 05:06:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:38,674 INFO L225 Difference]: With dead ends: 418 [2022-01-18 05:06:38,674 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 05:06:38,674 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 05:06:38,674 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 05:06:38,675 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 05:06:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 05:06:38,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2022-01-18 05:06:38,678 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 05:06:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2022-01-18 05:06:38,678 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2022-01-18 05:06:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:38,678 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2022-01-18 05:06:38,678 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 05:06:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2022-01-18 05:06:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:38,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:38,679 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:38,695 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 05:06:38,879 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 05:06:38,879 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash 823691970, now seen corresponding path program 448 times [2022-01-18 05:06:38,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:38,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785097710] [2022-01-18 05:06:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:38,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:38,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785097710] [2022-01-18 05:06:38,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785097710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815362414] [2022-01-18 05:06:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:38,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:38,955 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 05:06:38,955 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 05:06:39,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:39,298 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 54 treesize of output 42 [2022-01-18 05:06:39,350 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 05:06:39,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:39,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:39,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:06:39,493 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 05:06:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815362414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:39,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:39,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 05:06:39,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477272412] [2022-01-18 05:06:39,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:39,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:06:39,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:06:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:06:39,494 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 05:06:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:39,767 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2022-01-18 05:06:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:39,767 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 05:06:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:39,768 INFO L225 Difference]: With dead ends: 418 [2022-01-18 05:06:39,768 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 05:06:39,768 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 05:06:39,768 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 05:06:39,768 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 05:06:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 05:06:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2022-01-18 05:06:39,771 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 05:06:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2022-01-18 05:06:39,772 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2022-01-18 05:06:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:39,772 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2022-01-18 05:06:39,772 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 05:06:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2022-01-18 05:06:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:39,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:39,773 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 05:06:39,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-01-18 05:06:39,973 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 05:06:39,973 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1988140388, now seen corresponding path program 449 times [2022-01-18 05:06:39,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:39,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631688659] [2022-01-18 05:06:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:39,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:40,045 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 05:06:40,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631688659] [2022-01-18 05:06:40,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631688659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384983949] [2022-01-18 05:06:40,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:40,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:40,046 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 05:06:40,046 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 05:06:40,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:40,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:40,388 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 05:06:40,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:40,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:40,480 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 24 treesize of output 24 [2022-01-18 05:06:40,511 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 05:06:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384983949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:40,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:40,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:06:40,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841198955] [2022-01-18 05:06:40,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:40,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:06:40,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:06:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:06:40,512 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 05:06:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:40,676 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2022-01-18 05:06:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:40,677 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 05:06:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:40,677 INFO L225 Difference]: With dead ends: 407 [2022-01-18 05:06:40,677 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 05:06:40,677 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 05:06:40,677 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 05:06:40,678 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 05:06:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 05:06:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2022-01-18 05:06:40,680 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 05:06:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2022-01-18 05:06:40,681 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2022-01-18 05:06:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:40,681 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2022-01-18 05:06:40,681 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 05:06:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2022-01-18 05:06:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:40,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:40,682 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 05:06:40,698 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 05:06:40,882 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 05:06:40,882 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash 194398278, now seen corresponding path program 450 times [2022-01-18 05:06:40,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:40,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859978278] [2022-01-18 05:06:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:40,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:40,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859978278] [2022-01-18 05:06:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859978278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006456613] [2022-01-18 05:06:40,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:40,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:40,944 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 05:06:40,944 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 05:06:41,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:06:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:41,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:41,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:41,358 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 24 treesize of output 24 [2022-01-18 05:06:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:41,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006456613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:41,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:41,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 05:06:41,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320821109] [2022-01-18 05:06:41,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:41,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:06:41,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:06:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:06:41,390 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 05:06:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:41,569 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2022-01-18 05:06:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:41,570 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 05:06:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:41,570 INFO L225 Difference]: With dead ends: 397 [2022-01-18 05:06:41,570 INFO L226 Difference]: Without dead ends: 397 [2022-01-18 05:06:41,570 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 05:06:41,570 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 05:06:41,570 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 05:06:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-18 05:06:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2022-01-18 05:06:41,573 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 05:06:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2022-01-18 05:06:41,574 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2022-01-18 05:06:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2022-01-18 05:06:41,574 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 05:06:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2022-01-18 05:06:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:41,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:41,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:41,591 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 05:06:41,774 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 05:06:41,775 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash 647981362, now seen corresponding path program 451 times [2022-01-18 05:06:41,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535309435] [2022-01-18 05:06:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:41,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:41,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535309435] [2022-01-18 05:06:41,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535309435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234507544] [2022-01-18 05:06:41,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:41,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:41,856 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 05:06:41,856 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 05:06:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:42,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:42,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:42,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:42,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:42,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:42,606 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 05:06:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234507544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:42,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:06:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530506062] [2022-01-18 05:06:42,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:42,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:42,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:42,607 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 05:06:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:42,973 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2022-01-18 05:06:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:42,973 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 05:06:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:42,974 INFO L225 Difference]: With dead ends: 592 [2022-01-18 05:06:42,974 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 05:06:42,974 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 05:06:42,974 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 05:06:42,974 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 05:06:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 05:06:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2022-01-18 05:06:42,978 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 05:06:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2022-01-18 05:06:42,978 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2022-01-18 05:06:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2022-01-18 05:06:42,978 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 05:06:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2022-01-18 05:06:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:42,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:42,979 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 05:06:42,995 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 05:06:43,179 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 05:06:43,179 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1530058796, now seen corresponding path program 452 times [2022-01-18 05:06:43,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:43,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554869822] [2022-01-18 05:06:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:43,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:43,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:43,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554869822] [2022-01-18 05:06:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554869822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:43,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230519907] [2022-01-18 05:06:43,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:43,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:43,258 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 05:06:43,259 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 05:06:43,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:43,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:43,784 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 05:06:43,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:43,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:43,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:43,998 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 05:06:43,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230519907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:43,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:43,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:06:43,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395534773] [2022-01-18 05:06:43,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:43,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:43,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:43,999 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 05:06:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:44,414 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2022-01-18 05:06:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:44,415 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 05:06:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:44,415 INFO L225 Difference]: With dead ends: 598 [2022-01-18 05:06:44,415 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 05:06:44,416 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 05:06:44,416 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:06:44,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 166 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:06:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 05:06:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2022-01-18 05:06:44,419 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 05:06:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2022-01-18 05:06:44,420 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2022-01-18 05:06:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:44,420 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2022-01-18 05:06:44,420 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 05:06:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2022-01-18 05:06:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:44,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:44,420 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 05:06:44,437 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 05:06:44,621 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 05:06:44,621 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash 994828994, now seen corresponding path program 453 times [2022-01-18 05:06:44,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:44,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867235213] [2022-01-18 05:06:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:44,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:44,696 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 05:06:44,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867235213] [2022-01-18 05:06:44,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867235213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50066599] [2022-01-18 05:06:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:44,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:44,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:44,698 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 05:06:44,698 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 05:06:44,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:44,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:45,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:45,206 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 05:06:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:45,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:45,312 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 49 treesize of output 45 [2022-01-18 05:06:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:45,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50066599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:45,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:45,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:45,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079598162] [2022-01-18 05:06:45,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:45,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:45,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:45,403 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 05:06:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:45,713 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2022-01-18 05:06:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:45,713 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 05:06:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:45,714 INFO L225 Difference]: With dead ends: 562 [2022-01-18 05:06:45,714 INFO L226 Difference]: Without dead ends: 550 [2022-01-18 05:06:45,714 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 05:06:45,714 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 05:06:45,714 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 05:06:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-18 05:06:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2022-01-18 05:06:45,718 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 05:06:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2022-01-18 05:06:45,718 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2022-01-18 05:06:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:45,718 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2022-01-18 05:06:45,718 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 05:06:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2022-01-18 05:06:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:45,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:45,719 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 05:06:45,735 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 05:06:45,919 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 05:06:45,919 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash -17863538, now seen corresponding path program 454 times [2022-01-18 05:06:45,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019597376] [2022-01-18 05:06:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:45,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:45,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019597376] [2022-01-18 05:06:45,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019597376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624444637] [2022-01-18 05:06:45,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:45,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:45,992 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 05:06:45,992 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 05:06:46,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:46,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:46,475 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 54 treesize of output 42 [2022-01-18 05:06:46,495 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 05:06:46,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:46,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:46,584 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 05:06:46,683 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 05:06:46,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624444637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:46,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:46,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:06:46,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633858959] [2022-01-18 05:06:46,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:46,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:06:46,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:06:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:06:46,683 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 05:06:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:47,008 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2022-01-18 05:06:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:47,008 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 05:06:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:47,009 INFO L225 Difference]: With dead ends: 594 [2022-01-18 05:06:47,009 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 05:06:47,009 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 05:06:47,009 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 05:06:47,009 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 05:06:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 05:06:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2022-01-18 05:06:47,013 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 05:06:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2022-01-18 05:06:47,013 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2022-01-18 05:06:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:47,013 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2022-01-18 05:06:47,013 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 05:06:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2022-01-18 05:06:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:47,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:47,014 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:47,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:47,214 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 05:06:47,214 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1605644534, now seen corresponding path program 455 times [2022-01-18 05:06:47,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:47,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240157618] [2022-01-18 05:06:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:47,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:47,300 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 05:06:47,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:47,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240157618] [2022-01-18 05:06:47,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240157618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:47,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560424801] [2022-01-18 05:06:47,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:47,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:47,301 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 05:06:47,301 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 05:06:47,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:47,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:47,806 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 65 treesize of output 51 [2022-01-18 05:06:47,862 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 05:06:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:48,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:48,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:48,101 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 05:06:48,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560424801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:48,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:48,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:06:48,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249197263] [2022-01-18 05:06:48,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:48,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:48,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:48,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:48,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:48,102 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 05:06:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:48,460 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2022-01-18 05:06:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:48,460 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 05:06:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:48,461 INFO L225 Difference]: With dead ends: 604 [2022-01-18 05:06:48,461 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 05:06:48,461 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 05:06:48,461 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 05:06:48,461 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 05:06:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 05:06:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2022-01-18 05:06:48,465 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 05:06:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2022-01-18 05:06:48,465 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2022-01-18 05:06:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2022-01-18 05:06:48,465 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 05:06:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2022-01-18 05:06:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:48,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:48,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:48,482 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 05:06:48,666 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 05:06:48,666 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -723567100, now seen corresponding path program 456 times [2022-01-18 05:06:48,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:48,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144959649] [2022-01-18 05:06:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:48,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:48,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144959649] [2022-01-18 05:06:48,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144959649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:48,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123164553] [2022-01-18 05:06:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:48,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:48,771 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 05:06:48,771 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 05:06:49,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:06:49,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:49,280 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 65 treesize of output 51 [2022-01-18 05:06:49,332 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 05:06:49,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:49,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:49,457 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 45 [2022-01-18 05:06:49,551 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 05:06:49,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123164553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:49,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:49,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:06:49,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849288190] [2022-01-18 05:06:49,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:49,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:49,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:49,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:49,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:49,552 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 05:06:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:49,964 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2022-01-18 05:06:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:49,964 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 05:06:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:49,965 INFO L225 Difference]: With dead ends: 610 [2022-01-18 05:06:49,965 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 05:06:49,965 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 05:06:49,965 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 05:06:49,965 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 05:06:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 05:06:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2022-01-18 05:06:49,969 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 05:06:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2022-01-18 05:06:49,969 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2022-01-18 05:06:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:49,969 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2022-01-18 05:06:49,969 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 05:06:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2022-01-18 05:06:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:49,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:49,970 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:49,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Ended with exit code 0 [2022-01-18 05:06:50,170 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 05:06:50,170 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1258796902, now seen corresponding path program 457 times [2022-01-18 05:06:50,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:50,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383133692] [2022-01-18 05:06:50,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:50,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:50,251 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 05:06:50,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383133692] [2022-01-18 05:06:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383133692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211622509] [2022-01-18 05:06:50,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:50,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:50,252 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 05:06:50,253 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 05:06:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:50,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:50,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:50,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:50,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:50,986 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 05:06:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211622509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:50,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:50,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:06:50,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481553276] [2022-01-18 05:06:50,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:50,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:06:50,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:06:50,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:06:50,987 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 05:06:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:51,275 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2022-01-18 05:06:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:51,275 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 05:06:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:51,276 INFO L225 Difference]: With dead ends: 574 [2022-01-18 05:06:51,276 INFO L226 Difference]: Without dead ends: 562 [2022-01-18 05:06:51,276 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 05:06:51,276 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 05:06:51,277 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 05:06:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-18 05:06:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2022-01-18 05:06:51,280 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 05:06:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2022-01-18 05:06:51,280 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2022-01-18 05:06:51,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:51,280 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2022-01-18 05:06:51,281 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 05:06:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2022-01-18 05:06:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:51,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:51,281 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:51,298 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 05:06:51,481 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 05:06:51,481 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -112663660, now seen corresponding path program 458 times [2022-01-18 05:06:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:51,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848630572] [2022-01-18 05:06:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:51,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:51,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848630572] [2022-01-18 05:06:51,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848630572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584602673] [2022-01-18 05:06:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:06:51,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:51,572 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 05:06:51,573 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 05:06:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:06:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:52,036 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 86 treesize of output 68 [2022-01-18 05:06:52,178 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 05:06:52,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:52,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:52,318 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 05:06:52,411 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 05:06:52,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584602673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:52,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:52,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:06:52,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536930111] [2022-01-18 05:06:52,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:52,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:52,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:52,412 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 05:06:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:52,867 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2022-01-18 05:06:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:06:52,867 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 05:06:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:52,868 INFO L225 Difference]: With dead ends: 682 [2022-01-18 05:06:52,868 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 05:06:52,868 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 05:06:52,868 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 05:06:52,868 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 05:06:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 05:06:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2022-01-18 05:06:52,872 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 05:06:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2022-01-18 05:06:52,873 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2022-01-18 05:06:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:52,873 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2022-01-18 05:06:52,873 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 05:06:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2022-01-18 05:06:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:52,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:52,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:52,890 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 05:06:53,073 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 05:06:53,073 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash 769413774, now seen corresponding path program 459 times [2022-01-18 05:06:53,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:53,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809490029] [2022-01-18 05:06:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:53,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:53,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809490029] [2022-01-18 05:06:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809490029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346036806] [2022-01-18 05:06:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:06:53,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:53,164 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 05:06:53,164 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 05:06:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:06:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:53,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:53,714 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 05:06:53,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:53,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:53,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:53,930 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 05:06:53,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346036806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:53,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:53,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:06:53,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523130221] [2022-01-18 05:06:53,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:53,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:53,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:53,931 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 05:06:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:54,645 INFO L93 Difference]: Finished difference Result 711 states and 1974 transitions. [2022-01-18 05:06:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:06:54,645 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 05:06:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:54,646 INFO L225 Difference]: With dead ends: 711 [2022-01-18 05:06:54,646 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 05:06:54,646 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 05:06:54,646 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 05:06:54,646 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 05:06:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 05:06:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 306. [2022-01-18 05:06:54,650 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 05:06:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2022-01-18 05:06:54,650 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2022-01-18 05:06:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2022-01-18 05:06:54,651 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 05:06:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2022-01-18 05:06:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:54,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:54,651 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 05:06:54,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:54,851 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 05:06:54,851 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 628233674, now seen corresponding path program 460 times [2022-01-18 05:06:54,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:54,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275004252] [2022-01-18 05:06:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:54,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:54,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275004252] [2022-01-18 05:06:54,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275004252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392853938] [2022-01-18 05:06:54,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:06:54,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:54,944 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 05:06:54,944 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 05:06:55,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:06:55,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:55,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:55,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:55,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:55,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:55,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:55,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:06:55,833 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 05:06:55,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392853938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:55,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:55,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:06:55,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009407988] [2022-01-18 05:06:55,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:55,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:55,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:55,834 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 05:06:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:56,204 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2022-01-18 05:06:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:06:56,204 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 05:06:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:56,205 INFO L225 Difference]: With dead ends: 650 [2022-01-18 05:06:56,205 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 05:06:56,206 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 05:06:56,206 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 05:06:56,206 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 05:06:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 05:06:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2022-01-18 05:06:56,210 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 05:06:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2022-01-18 05:06:56,210 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2022-01-18 05:06:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:56,210 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2022-01-18 05:06:56,210 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 05:06:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2022-01-18 05:06:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:56,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:56,211 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:56,228 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 05:06:56,411 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 05:06:56,411 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1622609294, now seen corresponding path program 461 times [2022-01-18 05:06:56,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:56,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593359103] [2022-01-18 05:06:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:56,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:56,503 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 05:06:56,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593359103] [2022-01-18 05:06:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593359103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161382259] [2022-01-18 05:06:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:06:56,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:56,504 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 05:06:56,505 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 05:06:56,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:06:56,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:56,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:57,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:57,286 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 49 treesize of output 45 [2022-01-18 05:06:57,376 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 05:06:57,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161382259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:57,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:57,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:06:57,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654409775] [2022-01-18 05:06:57,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:57,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:06:57,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:06:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:06:57,377 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 05:06:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:57,749 INFO L93 Difference]: Finished difference Result 646 states and 1838 transitions. [2022-01-18 05:06:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:06:57,750 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 05:06:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:57,751 INFO L225 Difference]: With dead ends: 646 [2022-01-18 05:06:57,751 INFO L226 Difference]: Without dead ends: 646 [2022-01-18 05:06:57,751 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 05:06:57,751 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 05:06:57,751 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 05:06:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-18 05:06:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 296. [2022-01-18 05:06:57,755 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 05:06:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2022-01-18 05:06:57,755 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2022-01-18 05:06:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:57,755 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2022-01-18 05:06:57,755 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 05:06:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2022-01-18 05:06:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:57,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:57,756 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:57,772 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 05:06:57,956 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 05:06:57,956 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1691904870, now seen corresponding path program 462 times [2022-01-18 05:06:57,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808162242] [2022-01-18 05:06:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:57,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:58,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808162242] [2022-01-18 05:06:58,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808162242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563669822] [2022-01-18 05:06:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:06:58,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:58,046 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 05:06:58,046 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 05:06:58,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:06:58,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:06:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:06:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:06:58,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:06:58,651 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 05:06:58,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:06:58,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:06:58,765 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 49 treesize of output 45 [2022-01-18 05:06:58,852 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 05:06:58,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563669822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:06:58,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:06:58,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:06:58,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512982020] [2022-01-18 05:06:58,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:06:58,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:06:58,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:06:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:06:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:06:58,853 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 05:06:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:06:59,476 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2022-01-18 05:06:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:06:59,476 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 05:06:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:06:59,477 INFO L225 Difference]: With dead ends: 650 [2022-01-18 05:06:59,477 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 05:06:59,477 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 05:06:59,477 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 05:06:59,477 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 05:06:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 05:06:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2022-01-18 05:06:59,481 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 05:06:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2022-01-18 05:06:59,481 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2022-01-18 05:06:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:06:59,482 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2022-01-18 05:06:59,482 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 05:06:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2022-01-18 05:06:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:06:59,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:06:59,482 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:06:59,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Forceful destruction successful, exit code 0 [2022-01-18 05:06:59,682 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 05:06:59,682 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:06:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:06:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1668004956, now seen corresponding path program 463 times [2022-01-18 05:06:59,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:06:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602727027] [2022-01-18 05:06:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:06:59,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:06:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:06:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:06:59,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:06:59,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602727027] [2022-01-18 05:06:59,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602727027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:06:59,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976746114] [2022-01-18 05:06:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:06:59,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:06:59,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:06:59,781 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 05:06:59,781 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 05:07:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:00,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:00,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:00,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:00,500 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 05:07:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:00,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976746114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:00,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:00,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:00,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713271201] [2022-01-18 05:07:00,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:00,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:00,602 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 05:07:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:01,112 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2022-01-18 05:07:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:01,126 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 05:07:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:01,126 INFO L225 Difference]: With dead ends: 627 [2022-01-18 05:07:01,126 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 05:07:01,127 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 05:07:01,127 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 05:07:01,127 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 05:07:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 05:07:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2022-01-18 05:07:01,130 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 05:07:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2022-01-18 05:07:01,131 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2022-01-18 05:07:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:01,131 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2022-01-18 05:07:01,131 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 05:07:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2022-01-18 05:07:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:01,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:01,131 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 05:07:01,148 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 05:07:01,331 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 05:07:01,332 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash -250263538, now seen corresponding path program 464 times [2022-01-18 05:07:01,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943709599] [2022-01-18 05:07:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:01,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:01,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:01,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943709599] [2022-01-18 05:07:01,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943709599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201784680] [2022-01-18 05:07:01,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:01,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:01,413 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 05:07:01,414 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 05:07:01,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:01,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:01,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:01,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:01,945 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 05:07:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:02,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:02,052 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 49 treesize of output 45 [2022-01-18 05:07:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:02,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201784680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:02,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:02,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:02,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624975636] [2022-01-18 05:07:02,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:02,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:02,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:02,132 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 05:07:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:02,501 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2022-01-18 05:07:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:02,502 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 05:07:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:02,502 INFO L225 Difference]: With dead ends: 567 [2022-01-18 05:07:02,502 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 05:07:02,503 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 05:07:02,503 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 05:07:02,503 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 05:07:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 05:07:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2022-01-18 05:07:02,506 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 05:07:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2022-01-18 05:07:02,507 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2022-01-18 05:07:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:02,507 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2022-01-18 05:07:02,507 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 05:07:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2022-01-18 05:07:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:02,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:02,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:02,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:02,707 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 05:07:02,708 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash 490633796, now seen corresponding path program 465 times [2022-01-18 05:07:02,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:02,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752217149] [2022-01-18 05:07:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:02,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:02,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:02,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752217149] [2022-01-18 05:07:02,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752217149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:02,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034823431] [2022-01-18 05:07:02,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:02,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:02,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:02,791 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 05:07:02,792 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 05:07:03,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:03,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:03,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:03,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:03,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:03,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034823431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:03,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:03,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:03,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143519968] [2022-01-18 05:07:03,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:03,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:03,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:03,545 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 05:07:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:04,024 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2022-01-18 05:07:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:04,025 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 05:07:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:04,026 INFO L225 Difference]: With dead ends: 592 [2022-01-18 05:07:04,026 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 05:07:04,026 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 05:07:04,026 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 05:07:04,026 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 05:07:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 05:07:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2022-01-18 05:07:04,037 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 05:07:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 05:07:04,038 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 05:07:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:04,038 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 05:07:04,038 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 05:07:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 05:07:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:04,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:04,038 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 05:07:04,056 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 05:07:04,239 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 05:07:04,239 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 514533710, now seen corresponding path program 466 times [2022-01-18 05:07:04,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:04,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233422437] [2022-01-18 05:07:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:04,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:04,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:04,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233422437] [2022-01-18 05:07:04,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233422437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:04,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699306931] [2022-01-18 05:07:04,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:04,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:04,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:04,325 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 05:07:04,326 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 05:07:04,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:04,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:04,894 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 05:07:04,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:05,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:05,013 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 49 treesize of output 45 [2022-01-18 05:07:05,110 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 05:07:05,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699306931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:05,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793943708] [2022-01-18 05:07:05,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:05,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:05,111 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 05:07:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:05,422 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2022-01-18 05:07:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:05,422 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 05:07:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:05,423 INFO L225 Difference]: With dead ends: 563 [2022-01-18 05:07:05,423 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 05:07:05,423 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 05:07:05,423 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 05:07:05,423 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 05:07:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 05:07:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2022-01-18 05:07:05,426 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 05:07:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2022-01-18 05:07:05,427 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2022-01-18 05:07:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:05,427 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2022-01-18 05:07:05,427 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 05:07:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2022-01-18 05:07:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:05,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:05,427 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 05:07:05,444 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 05:07:05,628 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 05:07:05,628 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1181899674, now seen corresponding path program 467 times [2022-01-18 05:07:05,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:05,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867509093] [2022-01-18 05:07:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:05,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:05,700 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 05:07:05,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867509093] [2022-01-18 05:07:05,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867509093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596116510] [2022-01-18 05:07:05,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:05,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:05,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:05,701 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 05:07:05,702 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 05:07:05,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:05,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:06,161 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 05:07:06,182 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 05:07:06,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:06,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:06,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:06,348 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 05:07:06,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596116510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:06,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:06,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:07:06,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419512064] [2022-01-18 05:07:06,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:07:06,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:07:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:07:06,349 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 05:07:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:06,664 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2022-01-18 05:07:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:06,664 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 05:07:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:06,665 INFO L225 Difference]: With dead ends: 651 [2022-01-18 05:07:06,665 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 05:07:06,665 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 05:07:06,665 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 05:07:06,666 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 05:07:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 05:07:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2022-01-18 05:07:06,669 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 05:07:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2022-01-18 05:07:06,670 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2022-01-18 05:07:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:06,670 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2022-01-18 05:07:06,670 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 05:07:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2022-01-18 05:07:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:06,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:06,670 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 05:07:06,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:06,870 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 05:07:06,871 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1523197246, now seen corresponding path program 468 times [2022-01-18 05:07:06,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:06,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877979377] [2022-01-18 05:07:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:06,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:06,950 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 05:07:06,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:06,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877979377] [2022-01-18 05:07:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877979377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:06,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670076246] [2022-01-18 05:07:06,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:06,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:06,952 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 05:07:06,952 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 05:07:07,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:07:07,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:07,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:07,465 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 05:07:07,483 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 05:07:07,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:07,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:07,581 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 05:07:07,663 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 05:07:07,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670076246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:07,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:07,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:07,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355642929] [2022-01-18 05:07:07,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:07,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:07,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:07,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:07,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:07,663 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 05:07:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:07,993 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2022-01-18 05:07:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:07,993 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 05:07:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:07,994 INFO L225 Difference]: With dead ends: 612 [2022-01-18 05:07:07,994 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 05:07:07,994 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 05:07:07,994 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 05:07:07,994 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 05:07:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 05:07:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2022-01-18 05:07:07,998 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 05:07:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2022-01-18 05:07:07,998 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2022-01-18 05:07:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2022-01-18 05:07:07,998 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 05:07:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2022-01-18 05:07:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:07,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:07,999 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:08,016 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 05:07:08,199 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 05:07:08,199 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash -782299912, now seen corresponding path program 469 times [2022-01-18 05:07:08,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:08,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424254040] [2022-01-18 05:07:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:08,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:08,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424254040] [2022-01-18 05:07:08,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424254040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539661602] [2022-01-18 05:07:08,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:08,278 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 05:07:08,278 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 05:07:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:08,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:08,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:08,815 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 05:07:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:08,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:08,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539661602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:09,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:09,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:09,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809062691] [2022-01-18 05:07:09,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:09,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:09,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:09,004 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 05:07:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:09,518 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2022-01-18 05:07:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:09,519 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 05:07:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:09,520 INFO L225 Difference]: With dead ends: 637 [2022-01-18 05:07:09,520 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 05:07:09,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:07:09,520 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 05:07:09,520 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 05:07:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 05:07:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2022-01-18 05:07:09,524 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 05:07:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-01-18 05:07:09,524 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-01-18 05:07:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:09,524 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-01-18 05:07:09,524 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 05:07:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-01-18 05:07:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:09,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:09,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:09,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:09,725 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 05:07:09,725 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -758399998, now seen corresponding path program 470 times [2022-01-18 05:07:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833547832] [2022-01-18 05:07:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:09,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:09,816 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 05:07:09,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833547832] [2022-01-18 05:07:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833547832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859589382] [2022-01-18 05:07:09,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:09,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:09,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:09,817 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 05:07:09,818 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 05:07:10,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:10,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:10,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:10,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:10,487 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 45 [2022-01-18 05:07:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:10,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859589382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:10,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:10,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:10,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851322888] [2022-01-18 05:07:10,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:10,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:10,577 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 05:07:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:10,934 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2022-01-18 05:07:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:10,934 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 05:07:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:10,935 INFO L225 Difference]: With dead ends: 608 [2022-01-18 05:07:10,935 INFO L226 Difference]: Without dead ends: 608 [2022-01-18 05:07:10,935 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 05:07:10,935 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 05:07:10,935 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 05:07:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-18 05:07:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2022-01-18 05:07:10,939 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 05:07:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 05:07:10,939 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 05:07:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:10,939 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 05:07:10,940 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 05:07:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 05:07:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:10,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:10,940 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:10,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-01-18 05:07:11,140 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 05:07:11,140 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1874390962, now seen corresponding path program 471 times [2022-01-18 05:07:11,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:11,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042894136] [2022-01-18 05:07:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:11,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:11,222 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 05:07:11,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042894136] [2022-01-18 05:07:11,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042894136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529535299] [2022-01-18 05:07:11,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:11,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:11,223 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 05:07:11,223 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 05:07:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:11,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:11,765 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 05:07:11,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:11,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:11,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:12,017 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 05:07:12,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529535299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:12,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:12,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:12,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266126296] [2022-01-18 05:07:12,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:12,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:12,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:12,018 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 05:07:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:12,289 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2022-01-18 05:07:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:12,289 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 05:07:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:12,290 INFO L225 Difference]: With dead ends: 489 [2022-01-18 05:07:12,290 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 05:07:12,290 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 05:07:12,290 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 05:07:12,291 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 05:07:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 05:07:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2022-01-18 05:07:12,294 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 05:07:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2022-01-18 05:07:12,294 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2022-01-18 05:07:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:12,294 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2022-01-18 05:07:12,294 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 05:07:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2022-01-18 05:07:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:12,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:12,295 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 05:07:12,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-01-18 05:07:12,495 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 05:07:12,495 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -992313528, now seen corresponding path program 472 times [2022-01-18 05:07:12,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:12,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993647130] [2022-01-18 05:07:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:12,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:12,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993647130] [2022-01-18 05:07:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993647130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322169105] [2022-01-18 05:07:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:12,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:12,577 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 05:07:12,578 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 05:07:12,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:12,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:12,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:13,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:13,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:13,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322169105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:13,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:13,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:13,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630277925] [2022-01-18 05:07:13,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:13,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:13,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:13,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:13,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:13,374 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 05:07:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:13,689 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2022-01-18 05:07:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:07:13,689 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 05:07:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:13,690 INFO L225 Difference]: With dead ends: 495 [2022-01-18 05:07:13,690 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 05:07:13,690 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 05:07:13,690 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 05:07:13,690 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 05:07:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 05:07:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2022-01-18 05:07:13,693 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 05:07:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 05:07:13,694 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 05:07:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:13,694 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 05:07:13,694 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 05:07:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 05:07:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:13,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:13,694 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 05:07:13,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:13,895 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 05:07:13,895 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1527543330, now seen corresponding path program 473 times [2022-01-18 05:07:13,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578197229] [2022-01-18 05:07:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:13,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578197229] [2022-01-18 05:07:13,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578197229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797791538] [2022-01-18 05:07:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:13,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:13,974 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 05:07:13,975 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 05:07:14,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:14,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:14,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:14,504 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 05:07:14,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:14,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:14,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:14,724 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 05:07:14,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797791538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:14,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:14,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:14,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223540280] [2022-01-18 05:07:14,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:14,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:14,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:14,725 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 05:07:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:14,955 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2022-01-18 05:07:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:14,955 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 05:07:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:14,956 INFO L225 Difference]: With dead ends: 459 [2022-01-18 05:07:14,956 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 05:07:14,956 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 05:07:14,956 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 05:07:14,956 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 05:07:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 05:07:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2022-01-18 05:07:14,959 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 05:07:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 05:07:14,959 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 05:07:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:14,959 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 05:07:14,960 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 05:07:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 05:07:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:14,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:14,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:14,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:15,160 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 05:07:15,160 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash -381410088, now seen corresponding path program 474 times [2022-01-18 05:07:15,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532675772] [2022-01-18 05:07:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:15,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:15,260 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 05:07:15,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532675772] [2022-01-18 05:07:15,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532675772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807170468] [2022-01-18 05:07:15,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:15,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:15,261 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 05:07:15,262 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 05:07:15,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:07:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:15,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:15,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:15,935 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 05:07:15,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:16,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:16,052 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 49 treesize of output 45 [2022-01-18 05:07:16,178 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 05:07:16,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807170468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:16,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:16,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:16,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628975327] [2022-01-18 05:07:16,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:16,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:16,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:16,179 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 05:07:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:16,504 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2022-01-18 05:07:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:16,504 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 05:07:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:16,505 INFO L225 Difference]: With dead ends: 576 [2022-01-18 05:07:16,505 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 05:07:16,505 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 05:07:16,505 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 05:07:16,505 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 05:07:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 05:07:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2022-01-18 05:07:16,509 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 05:07:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 05:07:16,509 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 05:07:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:16,509 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 05:07:16,510 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 05:07:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 05:07:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:16,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:16,510 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 05:07:16,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:16,710 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 05:07:16,710 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 500667346, now seen corresponding path program 475 times [2022-01-18 05:07:16,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:16,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406507640] [2022-01-18 05:07:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:16,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:16,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406507640] [2022-01-18 05:07:16,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406507640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831392555] [2022-01-18 05:07:16,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:16,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:16,794 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 05:07:16,795 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 05:07:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:17,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:17,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:17,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:17,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:17,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:17,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831392555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:17,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:17,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:17,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404968243] [2022-01-18 05:07:17,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:17,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:17,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:17,599 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 05:07:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:18,017 INFO L93 Difference]: Finished difference Result 605 states and 1669 transitions. [2022-01-18 05:07:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:18,017 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 05:07:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:18,018 INFO L225 Difference]: With dead ends: 605 [2022-01-18 05:07:18,018 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 05:07:18,018 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 05:07:18,018 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 05:07:18,018 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 05:07:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 05:07:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 306. [2022-01-18 05:07:18,022 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 05:07:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2022-01-18 05:07:18,022 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2022-01-18 05:07:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:18,022 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2022-01-18 05:07:18,022 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 05:07:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2022-01-18 05:07:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:18,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:18,023 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 05:07:18,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-01-18 05:07:18,223 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 05:07:18,223 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 359487246, now seen corresponding path program 476 times [2022-01-18 05:07:18,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:18,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202825004] [2022-01-18 05:07:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:18,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:18,315 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 05:07:18,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202825004] [2022-01-18 05:07:18,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202825004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983146843] [2022-01-18 05:07:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:18,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:18,317 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 05:07:18,317 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 05:07:18,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:18,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:18,795 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 86 treesize of output 68 [2022-01-18 05:07:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:18,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:19,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:19,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983146843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:19,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:19,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255388728] [2022-01-18 05:07:19,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:19,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:19,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:19,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:19,198 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 05:07:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:19,401 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2022-01-18 05:07:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:19,401 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 05:07:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:19,402 INFO L225 Difference]: With dead ends: 544 [2022-01-18 05:07:19,402 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 05:07:19,402 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 05:07:19,402 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 05:07:19,402 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 05:07:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 05:07:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2022-01-18 05:07:19,406 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 05:07:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2022-01-18 05:07:19,406 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2022-01-18 05:07:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:19,406 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2022-01-18 05:07:19,406 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 05:07:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2022-01-18 05:07:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:19,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:19,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:19,424 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 05:07:19,607 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 05:07:19,607 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1353862866, now seen corresponding path program 477 times [2022-01-18 05:07:19,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:19,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391602983] [2022-01-18 05:07:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:19,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:19,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391602983] [2022-01-18 05:07:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391602983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179480669] [2022-01-18 05:07:19,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:19,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:19,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:19,696 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 05:07:19,696 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 05:07:19,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:07:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:20,140 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 90 treesize of output 72 [2022-01-18 05:07:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:20,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:20,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:20,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179480669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:20,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:20,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:20,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424064349] [2022-01-18 05:07:20,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:20,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:20,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:20,482 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 05:07:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:20,780 INFO L93 Difference]: Finished difference Result 573 states and 1604 transitions. [2022-01-18 05:07:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:20,780 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 05:07:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:20,781 INFO L225 Difference]: With dead ends: 573 [2022-01-18 05:07:20,781 INFO L226 Difference]: Without dead ends: 573 [2022-01-18 05:07:20,781 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 05:07:20,781 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 05:07:20,781 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 05:07:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-18 05:07:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 296. [2022-01-18 05:07:20,785 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 05:07:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2022-01-18 05:07:20,785 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2022-01-18 05:07:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:20,785 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2022-01-18 05:07:20,785 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 05:07:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2022-01-18 05:07:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:20,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:20,786 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 05:07:20,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-01-18 05:07:20,986 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 05:07:20,986 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1960651298, now seen corresponding path program 478 times [2022-01-18 05:07:20,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027231975] [2022-01-18 05:07:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:20,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:21,072 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 05:07:21,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027231975] [2022-01-18 05:07:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027231975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096701132] [2022-01-18 05:07:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:21,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:21,074 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 05:07:21,074 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 05:07:21,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:21,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:21,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:21,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:21,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:21,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:21,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:21,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096701132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:21,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:21,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:21,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005163264] [2022-01-18 05:07:21,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:21,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:21,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:21,907 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 05:07:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:22,237 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2022-01-18 05:07:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:07:22,237 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 05:07:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:22,238 INFO L225 Difference]: With dead ends: 544 [2022-01-18 05:07:22,238 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 05:07:22,238 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 05:07:22,238 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 05:07:22,238 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 05:07:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 05:07:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2022-01-18 05:07:22,242 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 05:07:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2022-01-18 05:07:22,242 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2022-01-18 05:07:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2022-01-18 05:07:22,242 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 05:07:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2022-01-18 05:07:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:22,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:22,243 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 05:07:22,259 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 05:07:22,443 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 05:07:22,443 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1936751384, now seen corresponding path program 479 times [2022-01-18 05:07:22,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:22,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164749191] [2022-01-18 05:07:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:22,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:22,528 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 05:07:22,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164749191] [2022-01-18 05:07:22,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164749191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331005341] [2022-01-18 05:07:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:22,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:22,529 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 05:07:22,529 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 05:07:22,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:23,008 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 106 treesize of output 84 [2022-01-18 05:07:23,086 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 05:07:23,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:23,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:23,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:23,310 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 05:07:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331005341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:23,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:23,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47127341] [2022-01-18 05:07:23,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:23,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:23,311 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 05:07:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:23,620 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2022-01-18 05:07:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:23,620 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 05:07:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:23,621 INFO L225 Difference]: With dead ends: 521 [2022-01-18 05:07:23,621 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 05:07:23,621 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 05:07:23,621 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 05:07:23,621 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 05:07:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 05:07:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2022-01-18 05:07:23,625 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 05:07:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 05:07:23,625 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 05:07:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:23,625 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 05:07:23,625 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 05:07:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 05:07:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:23,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:23,626 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 05:07:23,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-01-18 05:07:23,826 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 05:07:23,826 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash -519009966, now seen corresponding path program 480 times [2022-01-18 05:07:23,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:23,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776691922] [2022-01-18 05:07:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:23,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:23,920 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 05:07:23,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776691922] [2022-01-18 05:07:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776691922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410838630] [2022-01-18 05:07:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:23,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:23,921 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 05:07:23,922 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 05:07:24,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:07:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:24,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:24,455 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 05:07:24,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:24,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:24,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:24,673 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 05:07:24,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410838630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:24,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:24,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773258192] [2022-01-18 05:07:24,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:24,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:24,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:24,674 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 05:07:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:24,932 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2022-01-18 05:07:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:24,932 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 05:07:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:24,933 INFO L225 Difference]: With dead ends: 461 [2022-01-18 05:07:24,933 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 05:07:24,933 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 05:07:24,933 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 05:07:24,933 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 05:07:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 05:07:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2022-01-18 05:07:24,936 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 05:07:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2022-01-18 05:07:24,937 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2022-01-18 05:07:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:24,937 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2022-01-18 05:07:24,937 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 05:07:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2022-01-18 05:07:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:24,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:24,937 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 05:07:24,954 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 05:07:25,138 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 05:07:25,138 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash 221887368, now seen corresponding path program 481 times [2022-01-18 05:07:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:25,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984552902] [2022-01-18 05:07:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:25,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:25,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984552902] [2022-01-18 05:07:25,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984552902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173472970] [2022-01-18 05:07:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:25,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:25,233 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 05:07:25,233 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 05:07:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:25,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:25,807 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 05:07:25,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:25,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:25,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:26,018 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 05:07:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173472970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:26,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:26,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:26,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434476592] [2022-01-18 05:07:26,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:26,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:26,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:26,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:26,019 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 05:07:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:26,346 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2022-01-18 05:07:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:26,347 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 05:07:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:26,347 INFO L225 Difference]: With dead ends: 486 [2022-01-18 05:07:26,347 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 05:07:26,348 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 05:07:26,348 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 05:07:26,348 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 05:07:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 05:07:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2022-01-18 05:07:26,351 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 05:07:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2022-01-18 05:07:26,351 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2022-01-18 05:07:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:26,352 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2022-01-18 05:07:26,352 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 05:07:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2022-01-18 05:07:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:26,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:26,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:26,369 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 05:07:26,552 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 05:07:26,552 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 245787282, now seen corresponding path program 482 times [2022-01-18 05:07:26,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912079705] [2022-01-18 05:07:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:26,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:26,637 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 05:07:26,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:26,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912079705] [2022-01-18 05:07:26,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912079705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:26,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543565952] [2022-01-18 05:07:26,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:26,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:26,639 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 05:07:26,639 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 05:07:26,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:27,157 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 75 treesize of output 59 [2022-01-18 05:07:27,226 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 05:07:27,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:27,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:27,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:27,461 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 05:07:27,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543565952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:27,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:27,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:27,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748679021] [2022-01-18 05:07:27,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:27,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:27,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:27,462 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 05:07:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:27,692 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2022-01-18 05:07:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:27,692 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 05:07:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:27,692 INFO L225 Difference]: With dead ends: 457 [2022-01-18 05:07:27,692 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 05:07:27,693 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 05:07:27,693 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 05:07:27,693 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 05:07:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 05:07:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2022-01-18 05:07:27,696 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 05:07:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 05:07:27,696 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 05:07:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:27,696 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 05:07:27,696 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 05:07:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 05:07:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:27,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:27,697 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 05:07:27,714 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 05:07:27,897 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 05:07:27,897 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1017876942, now seen corresponding path program 483 times [2022-01-18 05:07:27,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177744762] [2022-01-18 05:07:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:27,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:27,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:27,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177744762] [2022-01-18 05:07:27,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177744762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:27,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767707524] [2022-01-18 05:07:27,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:27,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:27,983 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 05:07:27,983 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 05:07:28,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:07:28,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:28,446 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 63 treesize of output 49 [2022-01-18 05:07:28,535 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 05:07:28,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:28,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:28,679 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 05:07:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:28,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767707524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:28,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:28,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:28,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638998189] [2022-01-18 05:07:28,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:28,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:28,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:28,753 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 05:07:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:29,045 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2022-01-18 05:07:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:29,045 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 05:07:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:29,046 INFO L225 Difference]: With dead ends: 586 [2022-01-18 05:07:29,046 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 05:07:29,046 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 05:07:29,046 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 05:07:29,046 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 05:07:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 05:07:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2022-01-18 05:07:29,067 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 05:07:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2022-01-18 05:07:29,067 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2022-01-18 05:07:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:29,067 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2022-01-18 05:07:29,067 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 05:07:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2022-01-18 05:07:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:29,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:29,068 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 05:07:29,085 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 05:07:29,268 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 05:07:29,268 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -135799508, now seen corresponding path program 484 times [2022-01-18 05:07:29,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:29,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921104666] [2022-01-18 05:07:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:29,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:29,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921104666] [2022-01-18 05:07:29,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921104666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080702072] [2022-01-18 05:07:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:29,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:29,355 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 05:07:29,355 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 05:07:29,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:29,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:29,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:29,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:30,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:30,012 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 05:07:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:30,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080702072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:30,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:30,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:30,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860832700] [2022-01-18 05:07:30,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:30,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:30,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:30,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:30,085 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 05:07:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:30,361 INFO L93 Difference]: Finished difference Result 563 states and 1580 transitions. [2022-01-18 05:07:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:07:30,362 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 05:07:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:30,362 INFO L225 Difference]: With dead ends: 563 [2022-01-18 05:07:30,362 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 05:07:30,363 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 05:07:30,363 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 05:07:30,363 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 05:07:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 05:07:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 307. [2022-01-18 05:07:30,366 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 05:07:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 05:07:30,367 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 05:07:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 05:07:30,367 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 05:07:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 05:07:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:30,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:30,367 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:30,384 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 05:07:30,568 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 05:07:30,568 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -276979608, now seen corresponding path program 485 times [2022-01-18 05:07:30,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359753375] [2022-01-18 05:07:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:30,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:30,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359753375] [2022-01-18 05:07:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359753375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757831360] [2022-01-18 05:07:30,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:30,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:30,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:30,656 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 05:07:30,657 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 05:07:30,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:31,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:31,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:31,315 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 05:07:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:31,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757831360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:31,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:31,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:31,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144544569] [2022-01-18 05:07:31,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:31,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:31,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:31,385 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 05:07:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:31,682 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2022-01-18 05:07:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:31,683 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 05:07:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:31,684 INFO L225 Difference]: With dead ends: 592 [2022-01-18 05:07:31,684 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 05:07:31,684 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 05:07:31,684 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 05:07:31,684 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 05:07:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 05:07:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2022-01-18 05:07:31,688 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 05:07:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2022-01-18 05:07:31,688 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2022-01-18 05:07:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2022-01-18 05:07:31,688 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 05:07:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2022-01-18 05:07:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:31,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:31,689 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:31,706 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 05:07:31,889 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 05:07:31,889 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash 717396012, now seen corresponding path program 486 times [2022-01-18 05:07:31,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:31,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086515197] [2022-01-18 05:07:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:31,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:31,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086515197] [2022-01-18 05:07:31,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086515197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216517031] [2022-01-18 05:07:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:31,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:31,980 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 05:07:31,980 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 05:07:32,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:07:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:32,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:32,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:32,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:32,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:32,685 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 05:07:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216517031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:32,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:32,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:32,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370179085] [2022-01-18 05:07:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:32,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:32,757 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 05:07:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:33,178 INFO L93 Difference]: Finished difference Result 621 states and 1737 transitions. [2022-01-18 05:07:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:07:33,178 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 05:07:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:33,179 INFO L225 Difference]: With dead ends: 621 [2022-01-18 05:07:33,179 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 05:07:33,179 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 05:07:33,179 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 05:07:33,179 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 05:07:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 05:07:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 307. [2022-01-18 05:07:33,183 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 05:07:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 05:07:33,183 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 05:07:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:33,183 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 05:07:33,183 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 05:07:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 05:07:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:33,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:33,184 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:33,201 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 05:07:33,384 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 05:07:33,384 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1697849144, now seen corresponding path program 487 times [2022-01-18 05:07:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:33,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653689891] [2022-01-18 05:07:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:33,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:33,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653689891] [2022-01-18 05:07:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653689891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482765353] [2022-01-18 05:07:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:33,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:33,477 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 05:07:33,477 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 05:07:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:33,947 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 63 treesize of output 49 [2022-01-18 05:07:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:34,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:34,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:34,198 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 05:07:34,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482765353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:34,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:34,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:34,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185672961] [2022-01-18 05:07:34,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:34,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:34,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:34,199 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 05:07:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:34,515 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2022-01-18 05:07:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:34,515 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 05:07:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:34,516 INFO L225 Difference]: With dead ends: 580 [2022-01-18 05:07:34,516 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 05:07:34,516 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 05:07:34,518 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 05:07:34,519 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 05:07:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 05:07:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2022-01-18 05:07:34,522 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 05:07:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2022-01-18 05:07:34,523 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2022-01-18 05:07:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2022-01-18 05:07:34,523 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 05:07:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2022-01-18 05:07:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:34,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:34,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:34,540 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 05:07:34,724 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 05:07:34,724 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1721749058, now seen corresponding path program 488 times [2022-01-18 05:07:34,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430388783] [2022-01-18 05:07:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:34,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:34,810 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 05:07:34,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:34,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430388783] [2022-01-18 05:07:34,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430388783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:34,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925118747] [2022-01-18 05:07:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:34,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:34,812 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 05:07:34,812 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 05:07:35,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:35,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:35,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:35,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:35,481 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 27 treesize of output 27 [2022-01-18 05:07:35,551 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 05:07:35,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925118747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:35,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:35,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:35,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463813108] [2022-01-18 05:07:35,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:35,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:35,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:35,551 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 05:07:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:35,917 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2022-01-18 05:07:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:07:35,918 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 05:07:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:35,918 INFO L225 Difference]: With dead ends: 586 [2022-01-18 05:07:35,918 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 05:07:35,919 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 05:07:35,919 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 05:07:35,919 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 05:07:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 05:07:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2022-01-18 05:07:35,922 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 05:07:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2022-01-18 05:07:35,923 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2022-01-18 05:07:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:35,923 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2022-01-18 05:07:35,923 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 05:07:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2022-01-18 05:07:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:35,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:35,923 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:35,940 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 05:07:36,124 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 05:07:36,124 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1544436786, now seen corresponding path program 489 times [2022-01-18 05:07:36,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918813487] [2022-01-18 05:07:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:36,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:36,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918813487] [2022-01-18 05:07:36,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918813487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006385730] [2022-01-18 05:07:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:36,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:36,215 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 05:07:36,215 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 05:07:36,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:07:36,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:36,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:36,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:36,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:36,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:36,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006385730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:36,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:36,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:36,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416386575] [2022-01-18 05:07:36,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:36,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:36,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:36,980 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 05:07:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:37,178 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2022-01-18 05:07:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:37,178 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 05:07:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:37,179 INFO L225 Difference]: With dead ends: 516 [2022-01-18 05:07:37,179 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 05:07:37,179 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 05:07:37,179 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 05:07:37,179 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 05:07:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 05:07:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2022-01-18 05:07:37,183 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 05:07:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2022-01-18 05:07:37,183 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2022-01-18 05:07:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2022-01-18 05:07:37,183 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 05:07:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2022-01-18 05:07:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:37,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:37,184 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:37,200 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 05:07:37,384 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 05:07:37,384 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -550061166, now seen corresponding path program 490 times [2022-01-18 05:07:37,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:37,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551880871] [2022-01-18 05:07:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:37,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:37,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551880871] [2022-01-18 05:07:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551880871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012452561] [2022-01-18 05:07:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:37,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:37,474 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 05:07:37,475 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 05:07:37,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:37,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:37,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:37,941 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 27 treesize of output 21 [2022-01-18 05:07:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:37,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:38,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:38,130 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 05:07:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012452561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:38,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:38,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:38,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24406479] [2022-01-18 05:07:38,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:38,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:38,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:38,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:38,203 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 05:07:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:38,574 INFO L93 Difference]: Finished difference Result 537 states and 1533 transitions. [2022-01-18 05:07:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:38,575 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 05:07:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:38,575 INFO L225 Difference]: With dead ends: 537 [2022-01-18 05:07:38,575 INFO L226 Difference]: Without dead ends: 537 [2022-01-18 05:07:38,576 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 05:07:38,576 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 05:07:38,576 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 05:07:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-18 05:07:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 298. [2022-01-18 05:07:38,579 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 05:07:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 05:07:38,580 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 05:07:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:38,580 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 05:07:38,580 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 05:07:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 05:07:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:38,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:38,580 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 05:07:38,597 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 05:07:38,780 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 05:07:38,781 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -845488348, now seen corresponding path program 491 times [2022-01-18 05:07:38,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:38,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978690818] [2022-01-18 05:07:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:38,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:38,868 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 05:07:38,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978690818] [2022-01-18 05:07:38,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978690818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547258694] [2022-01-18 05:07:38,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:38,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:38,869 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 05:07:38,870 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 05:07:39,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:39,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:39,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:39,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:39,588 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 05:07:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547258694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:39,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:39,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071977184] [2022-01-18 05:07:39,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:39,588 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 05:07:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:39,795 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2022-01-18 05:07:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:39,795 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 05:07:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:39,796 INFO L225 Difference]: With dead ends: 459 [2022-01-18 05:07:39,796 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 05:07:39,796 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 05:07:39,796 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 05:07:39,796 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 05:07:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 05:07:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2022-01-18 05:07:39,799 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 05:07:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2022-01-18 05:07:39,799 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2022-01-18 05:07:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:39,799 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2022-01-18 05:07:39,800 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 05:07:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2022-01-18 05:07:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:39,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:39,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:39,817 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 05:07:40,000 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 05:07:40,000 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036664, now seen corresponding path program 492 times [2022-01-18 05:07:40,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:40,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562710915] [2022-01-18 05:07:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:40,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:40,080 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 05:07:40,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562710915] [2022-01-18 05:07:40,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562710915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145320611] [2022-01-18 05:07:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:40,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:40,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:40,081 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 05:07:40,081 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 05:07:40,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:40,540 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 54 treesize of output 42 [2022-01-18 05:07:40,582 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 05:07:40,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:40,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:40,689 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 05:07:40,758 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 05:07:40,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145320611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:40,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:40,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:40,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272703838] [2022-01-18 05:07:40,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:40,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:40,759 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 05:07:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:40,992 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2022-01-18 05:07:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:40,992 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 05:07:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:40,993 INFO L225 Difference]: With dead ends: 504 [2022-01-18 05:07:40,993 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 05:07:40,993 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 05:07:40,993 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 05:07:40,993 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 05:07:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 05:07:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2022-01-18 05:07:40,997 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 05:07:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2022-01-18 05:07:40,997 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2022-01-18 05:07:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:40,997 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2022-01-18 05:07:40,997 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 05:07:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2022-01-18 05:07:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:40,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:40,998 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 05:07:41,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-01-18 05:07:41,198 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 05:07:41,198 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1658136750, now seen corresponding path program 493 times [2022-01-18 05:07:41,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:41,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017359604] [2022-01-18 05:07:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:41,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:41,280 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 05:07:41,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017359604] [2022-01-18 05:07:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017359604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931037698] [2022-01-18 05:07:41,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:41,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:41,281 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 05:07:41,281 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 05:07:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:41,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:41,780 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 05:07:41,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:41,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:41,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931037698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:41,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:41,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:07:41,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757523611] [2022-01-18 05:07:41,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:41,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:07:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:07:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:07:41,970 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 05:07:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:42,221 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2022-01-18 05:07:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:07:42,221 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 05:07:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:42,222 INFO L225 Difference]: With dead ends: 510 [2022-01-18 05:07:42,222 INFO L226 Difference]: Without dead ends: 510 [2022-01-18 05:07:42,222 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 05:07:42,222 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 05:07:42,222 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 05:07:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-18 05:07:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2022-01-18 05:07:42,226 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 05:07:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 05:07:42,226 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 05:07:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:42,226 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 05:07:42,226 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 05:07:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 05:07:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:42,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:42,227 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 05:07:42,244 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 05:07:42,427 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 05:07:42,427 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash -175001812, now seen corresponding path program 494 times [2022-01-18 05:07:42,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:42,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584397865] [2022-01-18 05:07:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:42,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:42,510 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 05:07:42,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584397865] [2022-01-18 05:07:42,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584397865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816084240] [2022-01-18 05:07:42,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:42,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:42,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:42,512 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 05:07:42,512 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 05:07:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:42,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:43,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:43,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:43,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816084240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:43,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:43,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:43,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112754270] [2022-01-18 05:07:43,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:43,162 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 05:07:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:43,379 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2022-01-18 05:07:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:43,379 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 05:07:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:43,380 INFO L225 Difference]: With dead ends: 479 [2022-01-18 05:07:43,380 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 05:07:43,380 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 05:07:43,380 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 05:07:43,380 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 05:07:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 05:07:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2022-01-18 05:07:43,384 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 05:07:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 05:07:43,384 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 05:07:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:43,385 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 05:07:43,385 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 05:07:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 05:07:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:43,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:43,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:43,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-01-18 05:07:43,585 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 05:07:43,585 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2078712386, now seen corresponding path program 495 times [2022-01-18 05:07:43,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446686695] [2022-01-18 05:07:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:43,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:43,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446686695] [2022-01-18 05:07:43,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446686695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009845761] [2022-01-18 05:07:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:43,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:43,655 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 05:07:43,655 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 05:07:43,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:43,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:44,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:44,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:44,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:44,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:44,281 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 05:07:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009845761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:44,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:44,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:07:44,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751810543] [2022-01-18 05:07:44,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:44,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:07:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:07:44,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:07:44,282 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 05:07:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:44,500 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2022-01-18 05:07:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:44,500 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 05:07:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:44,501 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:07:44,501 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 05:07:44,501 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 05:07:44,501 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 05:07:44,501 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 05:07:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 05:07:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2022-01-18 05:07:44,504 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 05:07:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2022-01-18 05:07:44,505 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2022-01-18 05:07:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:44,505 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2022-01-18 05:07:44,505 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 05:07:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2022-01-18 05:07:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:44,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:44,505 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:44,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Ended with exit code 0 [2022-01-18 05:07:44,706 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 05:07:44,706 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1475357576, now seen corresponding path program 496 times [2022-01-18 05:07:44,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:44,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239726059] [2022-01-18 05:07:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:44,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:44,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239726059] [2022-01-18 05:07:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239726059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902208207] [2022-01-18 05:07:44,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:44,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:44,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:44,778 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 05:07:44,779 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 05:07:45,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:45,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:45,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:45,254 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 05:07:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:45,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:45,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:45,444 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 05:07:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902208207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:45,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:45,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:45,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341362777] [2022-01-18 05:07:45,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:45,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:45,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:45,445 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 05:07:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:45,671 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2022-01-18 05:07:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:45,671 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 05:07:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:45,672 INFO L225 Difference]: With dead ends: 476 [2022-01-18 05:07:45,672 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 05:07:45,672 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 05:07:45,672 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 05:07:45,672 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 05:07:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 05:07:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2022-01-18 05:07:45,675 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 05:07:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2022-01-18 05:07:45,676 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2022-01-18 05:07:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:45,676 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2022-01-18 05:07:45,676 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 05:07:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2022-01-18 05:07:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:45,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:45,676 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:45,693 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 05:07:45,877 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 05:07:45,877 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1451457662, now seen corresponding path program 497 times [2022-01-18 05:07:45,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104430430] [2022-01-18 05:07:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:45,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:45,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104430430] [2022-01-18 05:07:45,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104430430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293907218] [2022-01-18 05:07:45,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:45,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:45,952 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 05:07:45,953 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 05:07:46,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:46,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:46,432 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 05:07:46,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:46,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:46,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:46,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293907218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:46,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:46,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:46,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753699584] [2022-01-18 05:07:46,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:46,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:46,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:46,635 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 05:07:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:46,803 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2022-01-18 05:07:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:46,804 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 05:07:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:46,804 INFO L225 Difference]: With dead ends: 447 [2022-01-18 05:07:46,804 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 05:07:46,804 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 05:07:46,804 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 05:07:46,805 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 05:07:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 05:07:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2022-01-18 05:07:46,807 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 05:07:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-01-18 05:07:46,808 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2022-01-18 05:07:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-01-18 05:07:46,808 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 05:07:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-01-18 05:07:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:46,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:46,808 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:46,826 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 05:07:47,009 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 05:07:47,009 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1552152542, now seen corresponding path program 498 times [2022-01-18 05:07:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126992442] [2022-01-18 05:07:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:47,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:47,079 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 05:07:47,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126992442] [2022-01-18 05:07:47,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126992442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515368822] [2022-01-18 05:07:47,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:47,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:47,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:47,081 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 05:07:47,081 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 05:07:47,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:47,478 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 05:07:47,518 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 05:07:47,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:47,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:47,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:47,684 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 05:07:47,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515368822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:47,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:47,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:47,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41920219] [2022-01-18 05:07:47,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:47,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:47,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:47,685 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 05:07:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:47,921 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2022-01-18 05:07:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:47,921 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 05:07:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:47,922 INFO L225 Difference]: With dead ends: 482 [2022-01-18 05:07:47,922 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 05:07:47,922 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 05:07:47,922 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 05:07:47,922 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 05:07:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 05:07:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2022-01-18 05:07:47,925 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 05:07:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2022-01-18 05:07:47,926 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2022-01-18 05:07:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:47,926 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2022-01-18 05:07:47,926 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 05:07:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2022-01-18 05:07:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:47,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:47,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:47,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-01-18 05:07:48,127 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 05:07:48,127 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1576052456, now seen corresponding path program 499 times [2022-01-18 05:07:48,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657488492] [2022-01-18 05:07:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:48,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:48,201 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 05:07:48,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:48,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657488492] [2022-01-18 05:07:48,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657488492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:48,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602896255] [2022-01-18 05:07:48,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:48,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:48,202 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 05:07:48,202 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 05:07:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:48,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:48,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:48,594 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 54 treesize of output 42 [2022-01-18 05:07:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:48,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:48,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:48,755 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 27 treesize of output 27 [2022-01-18 05:07:48,834 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 05:07:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602896255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:48,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:07:48,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462186603] [2022-01-18 05:07:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:48,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:07:48,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:07:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:07:48,835 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 05:07:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:49,062 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2022-01-18 05:07:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:07:49,062 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 05:07:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:49,063 INFO L225 Difference]: With dead ends: 482 [2022-01-18 05:07:49,063 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 05:07:49,063 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 05:07:49,064 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 05:07:49,064 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 05:07:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 05:07:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2022-01-18 05:07:49,067 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 05:07:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2022-01-18 05:07:49,067 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2022-01-18 05:07:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:49,068 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2022-01-18 05:07:49,068 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 05:07:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2022-01-18 05:07:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:49,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:49,068 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 05:07:49,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:49,268 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 05:07:49,268 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1235779902, now seen corresponding path program 500 times [2022-01-18 05:07:49,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:49,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059537190] [2022-01-18 05:07:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:49,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:49,341 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 05:07:49,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059537190] [2022-01-18 05:07:49,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059537190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:49,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372787679] [2022-01-18 05:07:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:49,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:49,342 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 05:07:49,342 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 05:07:49,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:49,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:49,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:49,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:49,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:49,833 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 27 treesize of output 27 [2022-01-18 05:07:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372787679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:49,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:49,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:49,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222370808] [2022-01-18 05:07:49,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:49,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:49,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:49,909 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 05:07:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:50,079 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2022-01-18 05:07:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:50,079 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 05:07:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:50,080 INFO L225 Difference]: With dead ends: 457 [2022-01-18 05:07:50,080 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 05:07:50,080 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 05:07:50,080 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 05:07:50,080 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 05:07:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 05:07:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2022-01-18 05:07:50,083 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 05:07:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 05:07:50,084 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 05:07:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:50,084 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 05:07:50,084 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 05:07:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 05:07:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:50,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:50,084 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 05:07:50,101 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 05:07:50,284 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 05:07:50,285 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:50,285 INFO L85 PathProgramCache]: Analyzing trace with hash 106913962, now seen corresponding path program 501 times [2022-01-18 05:07:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127592993] [2022-01-18 05:07:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:50,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:50,344 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 05:07:50,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127592993] [2022-01-18 05:07:50,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127592993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656359128] [2022-01-18 05:07:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:50,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:50,346 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 05:07:50,346 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 05:07:50,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:07:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:50,738 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 54 treesize of output 42 [2022-01-18 05:07:50,758 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 05:07:50,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:50,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:50,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:50,895 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 05:07:50,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656359128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:50,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:50,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:07:50,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545695492] [2022-01-18 05:07:50,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:50,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:07:50,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:07:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:07:50,895 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 05:07:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:51,131 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2022-01-18 05:07:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:51,132 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 05:07:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:51,132 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:07:51,132 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 05:07:51,132 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 05:07:51,133 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 05:07:51,133 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 05:07:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 05:07:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2022-01-18 05:07:51,136 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 05:07:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 05:07:51,136 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 05:07:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:51,137 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 05:07:51,137 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 05:07:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 05:07:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:51,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:51,137 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 05:07:51,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:51,337 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 05:07:51,337 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1696784338, now seen corresponding path program 502 times [2022-01-18 05:07:51,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432650788] [2022-01-18 05:07:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:51,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:51,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:51,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432650788] [2022-01-18 05:07:51,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432650788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:51,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55803485] [2022-01-18 05:07:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:51,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:51,404 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 05:07:51,405 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 05:07:51,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:51,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:51,856 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 05:07:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:51,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:51,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:52,016 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 05:07:52,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55803485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:52,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:52,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:07:52,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026770631] [2022-01-18 05:07:52,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:52,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:07:52,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:07:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:07:52,017 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 05:07:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:52,240 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2022-01-18 05:07:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:52,240 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 05:07:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:52,241 INFO L225 Difference]: With dead ends: 525 [2022-01-18 05:07:52,241 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 05:07:52,241 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 05:07:52,241 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 05:07:52,241 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 05:07:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 05:07:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2022-01-18 05:07:52,245 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 05:07:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 05:07:52,245 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 05:07:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:52,245 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 05:07:52,245 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 05:07:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 05:07:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:52,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:52,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:52,262 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 05:07:52,446 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 05:07:52,446 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:52,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1857285624, now seen corresponding path program 503 times [2022-01-18 05:07:52,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:52,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022974049] [2022-01-18 05:07:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:52,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:52,512 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 05:07:52,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022974049] [2022-01-18 05:07:52,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022974049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75208458] [2022-01-18 05:07:52,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:52,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:52,513 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 05:07:52,514 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 05:07:52,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:52,925 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 75 treesize of output 59 [2022-01-18 05:07:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:52,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:53,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:53,066 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 05:07:53,155 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 05:07:53,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75208458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:53,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:53,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:07:53,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460783322] [2022-01-18 05:07:53,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:53,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:07:53,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:07:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:07:53,156 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 05:07:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:53,517 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2022-01-18 05:07:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:53,518 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 05:07:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:53,518 INFO L225 Difference]: With dead ends: 550 [2022-01-18 05:07:53,518 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 05:07:53,518 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 05:07:53,519 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 05:07:53,519 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 05:07:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 05:07:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2022-01-18 05:07:53,522 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 05:07:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 05:07:53,523 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 05:07:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:53,523 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 05:07:53,523 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 05:07:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 05:07:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:53,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:53,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:53,541 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 05:07:53,724 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 05:07:53,724 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1833385710, now seen corresponding path program 504 times [2022-01-18 05:07:53,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907680805] [2022-01-18 05:07:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:53,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:53,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907680805] [2022-01-18 05:07:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907680805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859423545] [2022-01-18 05:07:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:07:53,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:53,795 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 05:07:53,795 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 05:07:54,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:07:54,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:54,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:54,278 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 05:07:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:54,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:54,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:54,460 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 05:07:54,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859423545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:54,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:07:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445267998] [2022-01-18 05:07:54,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:07:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:07:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:07:54,461 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 05:07:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:54,710 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2022-01-18 05:07:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:54,711 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 05:07:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:54,711 INFO L225 Difference]: With dead ends: 521 [2022-01-18 05:07:54,711 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 05:07:54,712 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 05:07:54,712 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 05:07:54,712 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 05:07:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 05:07:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2022-01-18 05:07:54,715 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 05:07:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2022-01-18 05:07:54,716 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2022-01-18 05:07:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:54,716 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2022-01-18 05:07:54,716 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 05:07:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2022-01-18 05:07:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:54,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:54,716 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 05:07:54,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Forceful destruction successful, exit code 0 [2022-01-18 05:07:54,916 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 05:07:54,917 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:54,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1272473102, now seen corresponding path program 505 times [2022-01-18 05:07:54,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:54,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834518463] [2022-01-18 05:07:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:54,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:54,985 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 05:07:54,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834518463] [2022-01-18 05:07:54,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834518463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501837532] [2022-01-18 05:07:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:07:54,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:54,987 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 05:07:54,987 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 05:07:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:55,394 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 54 treesize of output 42 [2022-01-18 05:07:55,411 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 05:07:55,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:55,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:55,463 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 05:07:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:55,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501837532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:55,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:55,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:07:55,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796013019] [2022-01-18 05:07:55,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:55,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:07:55,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:07:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:07:55,577 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 05:07:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:55,753 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2022-01-18 05:07:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:55,754 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 05:07:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:55,754 INFO L225 Difference]: With dead ends: 470 [2022-01-18 05:07:55,754 INFO L226 Difference]: Without dead ends: 458 [2022-01-18 05:07:55,754 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 05:07:55,754 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 05:07:55,754 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 05:07:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-18 05:07:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2022-01-18 05:07:55,757 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 05:07:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 05:07:55,758 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 05:07:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:55,758 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 05:07:55,758 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 05:07:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 05:07:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:55,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:55,758 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:55,775 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 05:07:55,959 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 05:07:55,959 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2013370436, now seen corresponding path program 506 times [2022-01-18 05:07:55,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:55,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361790553] [2022-01-18 05:07:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:55,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:56,022 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 05:07:56,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:56,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361790553] [2022-01-18 05:07:56,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361790553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:56,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297532552] [2022-01-18 05:07:56,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:07:56,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:56,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:56,023 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 05:07:56,024 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 05:07:56,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:07:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:56,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:56,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:56,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:56,650 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 05:07:56,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297532552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:56,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:56,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:07:56,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030849999] [2022-01-18 05:07:56,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:56,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:07:56,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:07:56,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:07:56,651 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 05:07:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:56,903 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2022-01-18 05:07:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:07:56,904 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 05:07:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:56,904 INFO L225 Difference]: With dead ends: 495 [2022-01-18 05:07:56,904 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 05:07:56,904 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 05:07:56,904 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 05:07:56,905 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 05:07:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 05:07:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2022-01-18 05:07:56,908 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 05:07:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 05:07:56,908 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 05:07:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:56,908 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 05:07:56,908 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 05:07:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 05:07:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:56,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:56,909 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:56,926 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 05:07:57,109 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 05:07:57,109 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2037270350, now seen corresponding path program 507 times [2022-01-18 05:07:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652455876] [2022-01-18 05:07:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:57,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:57,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652455876] [2022-01-18 05:07:57,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652455876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32255468] [2022-01-18 05:07:57,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:07:57,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:57,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:57,177 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 05:07:57,178 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 05:07:57,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:07:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:57,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:57,638 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 05:07:57,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:57,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:57,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:07:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:57,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32255468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:57,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:57,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:07:57,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017744687] [2022-01-18 05:07:57,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:57,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:07:57,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:07:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:07:57,826 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 05:07:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:58,008 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2022-01-18 05:07:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:58,009 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 05:07:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:58,009 INFO L225 Difference]: With dead ends: 466 [2022-01-18 05:07:58,010 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 05:07:58,010 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 05:07:58,010 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 05:07:58,010 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 05:07:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 05:07:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2022-01-18 05:07:58,013 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 05:07:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 05:07:58,014 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 05:07:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:58,014 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 05:07:58,014 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 05:07:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 05:07:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:58,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:58,014 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:58,032 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 05:07:58,215 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 05:07:58,215 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash 745913258, now seen corresponding path program 508 times [2022-01-18 05:07:58,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:58,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301467910] [2022-01-18 05:07:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:58,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:58,278 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 05:07:58,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301467910] [2022-01-18 05:07:58,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301467910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068958026] [2022-01-18 05:07:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:07:58,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:58,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:58,279 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 05:07:58,280 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 05:07:58,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:07:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:58,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:58,707 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 05:07:58,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:58,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:58,787 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 05:07:58,847 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 05:07:58,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068958026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:58,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:58,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:07:58,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899366554] [2022-01-18 05:07:58,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:58,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:07:58,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:07:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:07:58,848 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 05:07:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:07:59,022 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2022-01-18 05:07:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:07:59,022 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 05:07:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:07:59,023 INFO L225 Difference]: With dead ends: 501 [2022-01-18 05:07:59,023 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 05:07:59,023 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 05:07:59,023 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 05:07:59,023 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 05:07:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 05:07:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2022-01-18 05:07:59,026 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 05:07:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2022-01-18 05:07:59,027 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2022-01-18 05:07:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:07:59,027 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2022-01-18 05:07:59,027 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 05:07:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2022-01-18 05:07:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:07:59,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:07:59,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:07:59,045 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 05:07:59,228 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 05:07:59,228 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:07:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:07:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash 769813172, now seen corresponding path program 509 times [2022-01-18 05:07:59,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:07:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501196855] [2022-01-18 05:07:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:07:59,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:07:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:07:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:07:59,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:07:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501196855] [2022-01-18 05:07:59,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501196855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:07:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944431554] [2022-01-18 05:07:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:07:59,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:07:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:07:59,297 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 05:07:59,297 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 05:07:59,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:07:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:07:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:07:59,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:07:59,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:07:59,724 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 05:07:59,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:07:59,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:07:59,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:07:59,883 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 05:07:59,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944431554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:07:59,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:07:59,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:07:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511205493] [2022-01-18 05:07:59,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:07:59,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:07:59,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:07:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:07:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:07:59,884 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 05:08:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:00,118 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2022-01-18 05:08:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:00,118 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 05:08:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:00,119 INFO L225 Difference]: With dead ends: 501 [2022-01-18 05:08:00,119 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 05:08:00,119 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 05:08:00,119 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 05:08:00,119 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 05:08:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 05:08:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2022-01-18 05:08:00,123 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 05:08:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2022-01-18 05:08:00,123 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2022-01-18 05:08:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:00,123 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2022-01-18 05:08:00,123 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 05:08:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2022-01-18 05:08:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:00,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:00,124 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:00,141 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 05:08:00,324 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 05:08:00,324 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2042019186, now seen corresponding path program 510 times [2022-01-18 05:08:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:00,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399847494] [2022-01-18 05:08:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:00,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:00,393 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 05:08:00,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:00,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399847494] [2022-01-18 05:08:00,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399847494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:00,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211098946] [2022-01-18 05:08:00,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:00,394 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 05:08:00,395 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 05:08:00,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:00,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:00,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:00,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:00,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211098946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:00,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:00,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:08:00,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160414509] [2022-01-18 05:08:00,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:00,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:08:00,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:08:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:08:00,939 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 05:08:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:01,156 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2022-01-18 05:08:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:01,156 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 05:08:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:01,157 INFO L225 Difference]: With dead ends: 476 [2022-01-18 05:08:01,157 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 05:08:01,157 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 05:08:01,157 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 05:08:01,157 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 05:08:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 05:08:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2022-01-18 05:08:01,162 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 05:08:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 05:08:01,163 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 05:08:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:01,163 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 05:08:01,163 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 05:08:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 05:08:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:01,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:01,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:01,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:01,371 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 05:08:01,371 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1356800314, now seen corresponding path program 511 times [2022-01-18 05:08:01,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:01,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452980156] [2022-01-18 05:08:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:01,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:01,454 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 05:08:01,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:01,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452980156] [2022-01-18 05:08:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452980156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926627887] [2022-01-18 05:08:01,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:01,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:01,457 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 05:08:01,458 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 05:08:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:02,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:02,075 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 05:08:02,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:02,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:02,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:02,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926627887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:02,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:02,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:02,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067384953] [2022-01-18 05:08:02,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:02,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:02,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:02,325 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 05:08:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:02,642 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2022-01-18 05:08:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:02,642 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 05:08:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:02,643 INFO L225 Difference]: With dead ends: 481 [2022-01-18 05:08:02,643 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 05:08:02,643 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 05:08:02,643 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 05:08:02,643 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 05:08:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 05:08:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2022-01-18 05:08:02,646 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 05:08:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2022-01-18 05:08:02,647 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2022-01-18 05:08:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:02,647 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2022-01-18 05:08:02,647 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 05:08:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2022-01-18 05:08:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:02,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:02,648 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:02,664 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 05:08:02,848 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 05:08:02,848 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash -474722880, now seen corresponding path program 512 times [2022-01-18 05:08:02,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108182998] [2022-01-18 05:08:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:02,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:02,929 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 05:08:02,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108182998] [2022-01-18 05:08:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108182998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747271280] [2022-01-18 05:08:02,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:02,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:02,930 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 05:08:02,931 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 05:08:03,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:03,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:03,443 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 65 treesize of output 51 [2022-01-18 05:08:03,500 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 05:08:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:03,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:03,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:03,733 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 05:08:03,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747271280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:03,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:03,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:03,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982635595] [2022-01-18 05:08:03,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:03,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:03,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:03,734 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 05:08:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:04,045 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2022-01-18 05:08:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:04,046 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 05:08:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:04,046 INFO L225 Difference]: With dead ends: 487 [2022-01-18 05:08:04,046 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 05:08:04,046 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 05:08:04,046 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 05:08:04,047 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 05:08:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 05:08:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2022-01-18 05:08:04,050 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 05:08:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 05:08:04,050 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 05:08:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:04,050 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 05:08:04,050 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 05:08:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 05:08:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:04,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:04,051 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 05:08:04,068 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 05:08:04,251 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 05:08:04,251 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1009952682, now seen corresponding path program 513 times [2022-01-18 05:08:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:04,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699332198] [2022-01-18 05:08:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:04,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:04,328 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 05:08:04,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699332198] [2022-01-18 05:08:04,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699332198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721752024] [2022-01-18 05:08:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:04,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:04,329 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 05:08:04,330 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 05:08:04,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:04,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:04,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:04,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:04,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:04,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:04,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:05,078 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 05:08:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721752024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:05,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:05,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:08:05,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810106215] [2022-01-18 05:08:05,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:05,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:05,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:05,079 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 05:08:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:05,341 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2022-01-18 05:08:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:05,341 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 05:08:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:05,342 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:08:05,342 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 05:08:05,342 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 05:08:05,342 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 05:08:05,342 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 05:08:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 05:08:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2022-01-18 05:08:05,345 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 05:08:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 05:08:05,346 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 05:08:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:05,346 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 05:08:05,346 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 05:08:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 05:08:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:05,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:05,346 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:05,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Ended with exit code 0 [2022-01-18 05:08:05,547 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 05:08:05,547 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash 136180560, now seen corresponding path program 514 times [2022-01-18 05:08:05,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155111724] [2022-01-18 05:08:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:05,633 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 05:08:05,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155111724] [2022-01-18 05:08:05,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155111724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165932485] [2022-01-18 05:08:05,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:05,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:05,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:05,634 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 05:08:05,634 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 05:08:05,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:06,097 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 90 treesize of output 72 [2022-01-18 05:08:06,222 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 05:08:06,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:06,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:06,338 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 49 treesize of output 45 [2022-01-18 05:08:06,474 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 05:08:06,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165932485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:06,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:06,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:06,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665039084] [2022-01-18 05:08:06,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:06,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:06,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:06,474 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 05:08:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:06,778 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2022-01-18 05:08:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:06,778 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 05:08:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:06,779 INFO L225 Difference]: With dead ends: 568 [2022-01-18 05:08:06,779 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 05:08:06,779 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 05:08:06,779 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 05:08:06,779 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 05:08:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 05:08:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2022-01-18 05:08:06,783 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 05:08:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2022-01-18 05:08:06,783 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2022-01-18 05:08:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:06,783 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2022-01-18 05:08:06,783 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 05:08:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2022-01-18 05:08:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:06,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:06,784 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:06,800 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 05:08:06,984 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 05:08:06,984 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1018257994, now seen corresponding path program 515 times [2022-01-18 05:08:06,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:06,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067928142] [2022-01-18 05:08:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:06,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:07,075 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 05:08:07,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:07,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067928142] [2022-01-18 05:08:07,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067928142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:07,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687183000] [2022-01-18 05:08:07,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:07,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:07,077 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 05:08:07,077 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 05:08:07,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:07,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:07,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:07,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:07,736 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 49 treesize of output 45 [2022-01-18 05:08:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:07,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687183000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:07,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:07,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:07,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212921809] [2022-01-18 05:08:07,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:07,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:07,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:07,867 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 05:08:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:08,321 INFO L93 Difference]: Finished difference Result 597 states and 1649 transitions. [2022-01-18 05:08:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 05:08:08,321 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 05:08:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:08,322 INFO L225 Difference]: With dead ends: 597 [2022-01-18 05:08:08,322 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 05:08:08,322 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 05:08:08,322 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 05:08:08,323 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 05:08:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 05:08:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 306. [2022-01-18 05:08:08,326 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 05:08:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2022-01-18 05:08:08,327 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2022-01-18 05:08:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:08,327 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2022-01-18 05:08:08,327 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 05:08:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2022-01-18 05:08:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:08,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:08,327 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:08,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:08,527 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 05:08:08,527 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash 877077894, now seen corresponding path program 516 times [2022-01-18 05:08:08,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:08,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964519721] [2022-01-18 05:08:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:08,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964519721] [2022-01-18 05:08:08,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964519721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254352643] [2022-01-18 05:08:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:08,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:08,616 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 05:08:08,616 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 05:08:08,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:09,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:09,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:09,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:09,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:09,538 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 05:08:09,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254352643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:09,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:09,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:09,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609540273] [2022-01-18 05:08:09,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:09,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:09,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:09,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:09,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:09,539 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 05:08:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:09,778 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2022-01-18 05:08:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:09,778 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 05:08:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:09,779 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:08:09,779 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 05:08:09,779 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 05:08:09,779 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 05:08:09,779 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 05:08:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 05:08:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2022-01-18 05:08:09,791 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 05:08:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2022-01-18 05:08:09,792 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2022-01-18 05:08:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2022-01-18 05:08:09,792 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 05:08:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2022-01-18 05:08:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:09,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:09,792 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 05:08:09,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Ended with exit code 0 [2022-01-18 05:08:09,993 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 05:08:09,993 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1871453514, now seen corresponding path program 517 times [2022-01-18 05:08:09,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:09,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289905990] [2022-01-18 05:08:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:09,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:10,081 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 05:08:10,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:10,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289905990] [2022-01-18 05:08:10,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289905990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:10,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912637870] [2022-01-18 05:08:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:10,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:10,082 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 05:08:10,083 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 05:08:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:10,586 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 106 treesize of output 84 [2022-01-18 05:08:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:10,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:10,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:10,824 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 49 treesize of output 45 [2022-01-18 05:08:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:10,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912637870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:10,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:10,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141450281] [2022-01-18 05:08:10,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:10,955 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 05:08:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:11,216 INFO L93 Difference]: Finished difference Result 532 states and 1513 transitions. [2022-01-18 05:08:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:11,216 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 05:08:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:11,217 INFO L225 Difference]: With dead ends: 532 [2022-01-18 05:08:11,217 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 05:08:11,217 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 05:08:11,217 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 05:08:11,217 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 05:08:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 05:08:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 296. [2022-01-18 05:08:11,221 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 05:08:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2022-01-18 05:08:11,221 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2022-01-18 05:08:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:11,222 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2022-01-18 05:08:11,222 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 05:08:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2022-01-18 05:08:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:11,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:11,222 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 05:08:11,239 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 05:08:11,422 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 05:08:11,423 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1443060650, now seen corresponding path program 518 times [2022-01-18 05:08:11,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118310564] [2022-01-18 05:08:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:11,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:11,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118310564] [2022-01-18 05:08:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118310564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113570027] [2022-01-18 05:08:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:11,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:11,509 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 05:08:11,510 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 05:08:11,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:11,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:11,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:12,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:12,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:12,213 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 05:08:12,357 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 05:08:12,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113570027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:12,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:12,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:12,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400509035] [2022-01-18 05:08:12,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:12,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:12,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:12,358 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 05:08:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:12,745 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2022-01-18 05:08:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:12,746 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 05:08:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:12,746 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:08:12,746 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 05:08:12,747 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 05:08:12,747 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:08:12,747 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 05:08:12,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 05:08:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2022-01-18 05:08:12,750 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 05:08:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2022-01-18 05:08:12,751 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2022-01-18 05:08:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2022-01-18 05:08:12,751 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 05:08:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2022-01-18 05:08:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:12,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:12,751 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 05:08:12,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-01-18 05:08:12,951 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 05:08:12,952 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1419160736, now seen corresponding path program 519 times [2022-01-18 05:08:12,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171260954] [2022-01-18 05:08:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:12,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:13,036 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 05:08:13,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:13,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171260954] [2022-01-18 05:08:13,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171260954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:13,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124850178] [2022-01-18 05:08:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:13,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:13,038 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 05:08:13,038 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 05:08:13,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:13,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:13,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:13,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:13,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:13,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:13,902 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 05:08:13,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124850178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:13,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:13,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:13,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224119370] [2022-01-18 05:08:13,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:13,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:13,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:13,903 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 05:08:14,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:14,244 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2022-01-18 05:08:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:14,244 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 05:08:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:14,245 INFO L225 Difference]: With dead ends: 513 [2022-01-18 05:08:14,245 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 05:08:14,245 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 05:08:14,246 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 05:08:14,246 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 05:08:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 05:08:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2022-01-18 05:08:14,249 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 05:08:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2022-01-18 05:08:14,249 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2022-01-18 05:08:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:14,249 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2022-01-18 05:08:14,250 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 05:08:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2022-01-18 05:08:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:14,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:14,250 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:14,267 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 05:08:14,450 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 05:08:14,450 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1419318, now seen corresponding path program 520 times [2022-01-18 05:08:14,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:14,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233538318] [2022-01-18 05:08:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:14,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:14,531 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 05:08:14,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233538318] [2022-01-18 05:08:14,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233538318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752682991] [2022-01-18 05:08:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:14,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:14,532 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 05:08:14,533 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 05:08:14,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:14,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:15,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:15,095 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 05:08:15,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:15,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:15,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752682991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:15,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:15,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:08:15,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245195061] [2022-01-18 05:08:15,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:15,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:15,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:15,309 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 05:08:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:15,577 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2022-01-18 05:08:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:15,577 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 05:08:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:15,578 INFO L225 Difference]: With dead ends: 453 [2022-01-18 05:08:15,578 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 05:08:15,578 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 05:08:15,578 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 05:08:15,578 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 05:08:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 05:08:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2022-01-18 05:08:15,581 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 05:08:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2022-01-18 05:08:15,581 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2022-01-18 05:08:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2022-01-18 05:08:15,581 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 05:08:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2022-01-18 05:08:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:15,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:15,582 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:15,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-01-18 05:08:15,782 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 05:08:15,782 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash 739478016, now seen corresponding path program 521 times [2022-01-18 05:08:15,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:15,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137033932] [2022-01-18 05:08:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:15,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:15,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:15,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137033932] [2022-01-18 05:08:15,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137033932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371457389] [2022-01-18 05:08:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:15,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:15,869 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 05:08:15,870 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 05:08:16,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:16,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:16,374 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 72 treesize of output 56 [2022-01-18 05:08:16,444 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 05:08:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:16,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:16,529 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 05:08:16,658 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 05:08:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371457389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:16,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:16,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:16,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636913197] [2022-01-18 05:08:16,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:16,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:16,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:16,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:16,659 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 05:08:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:17,003 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2022-01-18 05:08:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:17,004 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 05:08:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:17,004 INFO L225 Difference]: With dead ends: 478 [2022-01-18 05:08:17,004 INFO L226 Difference]: Without dead ends: 472 [2022-01-18 05:08:17,005 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 05:08:17,005 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 05:08:17,005 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 05:08:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-18 05:08:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2022-01-18 05:08:17,008 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 05:08:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2022-01-18 05:08:17,009 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2022-01-18 05:08:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:17,009 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2022-01-18 05:08:17,009 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 05:08:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2022-01-18 05:08:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:17,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:17,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:17,027 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 05:08:17,209 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 05:08:17,210 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash 763377930, now seen corresponding path program 522 times [2022-01-18 05:08:17,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:17,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035929955] [2022-01-18 05:08:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:17,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:17,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035929955] [2022-01-18 05:08:17,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035929955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103469881] [2022-01-18 05:08:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:17,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:17,293 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 05:08:17,293 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 05:08:17,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:17,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:17,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:18,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:18,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:08:18,138 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 05:08:18,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103469881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:18,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:18,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:18,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549690019] [2022-01-18 05:08:18,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:18,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:18,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:18,139 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 05:08:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:18,365 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2022-01-18 05:08:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:18,365 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 05:08:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:18,366 INFO L225 Difference]: With dead ends: 449 [2022-01-18 05:08:18,366 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 05:08:18,366 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 05:08:18,366 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 05:08:18,366 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 05:08:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 05:08:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2022-01-18 05:08:18,369 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 05:08:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 05:08:18,370 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 05:08:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:18,370 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 05:08:18,370 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 05:08:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 05:08:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:18,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:18,370 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:18,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-01-18 05:08:18,570 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 05:08:18,570 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -500286294, now seen corresponding path program 523 times [2022-01-18 05:08:18,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:18,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888558057] [2022-01-18 05:08:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:18,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:18,659 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 05:08:18,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888558057] [2022-01-18 05:08:18,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888558057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792519071] [2022-01-18 05:08:18,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:18,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:18,660 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 05:08:18,660 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 05:08:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:18,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:19,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:19,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:19,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:19,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:19,409 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 05:08:19,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792519071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:19,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:19,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:19,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405910518] [2022-01-18 05:08:19,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:19,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:19,410 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 05:08:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:19,732 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2022-01-18 05:08:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:19,733 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 05:08:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:19,733 INFO L225 Difference]: With dead ends: 578 [2022-01-18 05:08:19,733 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 05:08:19,734 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 05:08:19,734 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 05:08:19,734 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 05:08:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 05:08:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2022-01-18 05:08:19,738 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 05:08:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2022-01-18 05:08:19,738 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2022-01-18 05:08:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2022-01-18 05:08:19,738 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 05:08:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2022-01-18 05:08:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:19,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:19,739 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:19,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:19,939 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 05:08:19,939 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash 381791140, now seen corresponding path program 524 times [2022-01-18 05:08:19,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499642269] [2022-01-18 05:08:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:19,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:20,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499642269] [2022-01-18 05:08:20,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499642269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:20,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251557968] [2022-01-18 05:08:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:20,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:20,026 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 05:08:20,026 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 05:08:20,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:20,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:20,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:20,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:20,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:20,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:20,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:20,788 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 05:08:20,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251557968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:20,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:20,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:20,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780741065] [2022-01-18 05:08:20,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:20,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:20,789 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 05:08:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:21,083 INFO L93 Difference]: Finished difference Result 555 states and 1560 transitions. [2022-01-18 05:08:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:21,084 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 05:08:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:21,084 INFO L225 Difference]: With dead ends: 555 [2022-01-18 05:08:21,084 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 05:08:21,085 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 05:08:21,085 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 05:08:21,085 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 05:08:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 05:08:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 307. [2022-01-18 05:08:21,088 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 05:08:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 05:08:21,089 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 05:08:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:21,089 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 05:08:21,089 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 05:08:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 05:08:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:21,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:21,089 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:21,106 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 05:08:21,290 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 05:08:21,290 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash 240611040, now seen corresponding path program 525 times [2022-01-18 05:08:21,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:21,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237021739] [2022-01-18 05:08:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:21,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:21,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237021739] [2022-01-18 05:08:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237021739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009891814] [2022-01-18 05:08:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:21,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:21,383 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 05:08:21,384 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 05:08:21,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:21,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:21,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:21,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:22,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:22,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:22,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009891814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:22,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:22,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:22,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636440418] [2022-01-18 05:08:22,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:22,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:22,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:22,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:22,174 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 05:08:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:22,493 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2022-01-18 05:08:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:22,493 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 05:08:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:22,494 INFO L225 Difference]: With dead ends: 584 [2022-01-18 05:08:22,494 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 05:08:22,494 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 05:08:22,494 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:08:22,494 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 05:08:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 05:08:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2022-01-18 05:08:22,498 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 05:08:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2022-01-18 05:08:22,499 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2022-01-18 05:08:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:22,499 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2022-01-18 05:08:22,499 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 05:08:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2022-01-18 05:08:22,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:22,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:22,499 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 05:08:22,516 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 05:08:22,699 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 05:08:22,700 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1234986660, now seen corresponding path program 526 times [2022-01-18 05:08:22,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109941750] [2022-01-18 05:08:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:22,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:22,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:22,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109941750] [2022-01-18 05:08:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109941750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:22,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126336557] [2022-01-18 05:08:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:22,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:22,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:22,790 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 05:08:22,790 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 05:08:23,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:23,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:23,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:23,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:23,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:23,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:23,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:23,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126336557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:23,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:23,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:23,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446881418] [2022-01-18 05:08:23,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:23,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:23,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:23,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:23,572 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 05:08:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:23,988 INFO L93 Difference]: Finished difference Result 580 states and 1646 transitions. [2022-01-18 05:08:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:23,988 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 05:08:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:23,989 INFO L225 Difference]: With dead ends: 580 [2022-01-18 05:08:23,989 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 05:08:23,989 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 05:08:23,989 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 05:08:23,989 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 05:08:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 05:08:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 307. [2022-01-18 05:08:23,993 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 05:08:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2022-01-18 05:08:23,993 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2022-01-18 05:08:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:23,993 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2022-01-18 05:08:23,993 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 05:08:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2022-01-18 05:08:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:23,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:23,994 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 05:08:24,010 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 05:08:24,194 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 05:08:24,194 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:24,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:24,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527504, now seen corresponding path program 527 times [2022-01-18 05:08:24,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:24,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806435863] [2022-01-18 05:08:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:24,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:24,280 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 05:08:24,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806435863] [2022-01-18 05:08:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806435863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047196795] [2022-01-18 05:08:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:24,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:24,281 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 05:08:24,282 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 05:08:24,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:24,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:24,830 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 05:08:24,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:24,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:24,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:25,012 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 05:08:25,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047196795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:25,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:25,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:25,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734750574] [2022-01-18 05:08:25,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:25,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:25,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:25,013 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 05:08:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:25,292 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2022-01-18 05:08:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:25,292 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 05:08:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:25,293 INFO L225 Difference]: With dead ends: 572 [2022-01-18 05:08:25,293 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 05:08:25,293 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 05:08:25,293 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 05:08:25,293 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 05:08:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 05:08:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2022-01-18 05:08:25,297 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 05:08:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2022-01-18 05:08:25,298 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2022-01-18 05:08:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:25,298 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2022-01-18 05:08:25,298 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 05:08:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2022-01-18 05:08:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:25,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:25,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:25,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:25,498 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 05:08:25,498 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2055627590, now seen corresponding path program 528 times [2022-01-18 05:08:25,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:25,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247229062] [2022-01-18 05:08:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:25,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:25,583 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 05:08:25,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247229062] [2022-01-18 05:08:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247229062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480694866] [2022-01-18 05:08:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:25,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:25,584 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 05:08:25,584 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 05:08:25,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:25,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:26,051 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 05:08:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:26,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:26,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:26,254 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 27 treesize of output 27 [2022-01-18 05:08:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:26,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480694866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:26,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:26,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:26,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842740616] [2022-01-18 05:08:26,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:26,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:26,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:26,325 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 05:08:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:26,692 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2022-01-18 05:08:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:26,692 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 05:08:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:26,693 INFO L225 Difference]: With dead ends: 578 [2022-01-18 05:08:26,693 INFO L226 Difference]: Without dead ends: 578 [2022-01-18 05:08:26,693 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 05:08:26,693 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 05:08:26,693 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 05:08:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-18 05:08:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2022-01-18 05:08:26,697 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 05:08:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2022-01-18 05:08:26,698 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2022-01-18 05:08:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2022-01-18 05:08:26,698 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 05:08:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2022-01-18 05:08:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:26,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:26,698 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 05:08:26,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:26,898 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 05:08:26,899 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1026846138, now seen corresponding path program 529 times [2022-01-18 05:08:26,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33286217] [2022-01-18 05:08:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:26,988 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 05:08:26,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33286217] [2022-01-18 05:08:26,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33286217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:26,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51277676] [2022-01-18 05:08:26,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:26,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:26,989 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 05:08:26,990 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 05:08:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:27,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:27,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:27,511 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 05:08:27,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:27,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:27,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:27,731 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 05:08:27,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51277676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:27,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:27,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619492882] [2022-01-18 05:08:27,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:27,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:27,732 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 05:08:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:28,002 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2022-01-18 05:08:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:28,002 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 05:08:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:28,003 INFO L225 Difference]: With dead ends: 508 [2022-01-18 05:08:28,003 INFO L226 Difference]: Without dead ends: 508 [2022-01-18 05:08:28,003 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 05:08:28,003 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 05:08:28,004 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 05:08:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-18 05:08:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2022-01-18 05:08:28,007 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 05:08:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2022-01-18 05:08:28,007 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2022-01-18 05:08:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:28,007 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2022-01-18 05:08:28,007 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 05:08:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2022-01-18 05:08:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:28,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:28,008 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:28,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-01-18 05:08:28,209 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 05:08:28,210 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:28,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash -32470518, now seen corresponding path program 530 times [2022-01-18 05:08:28,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:28,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320520434] [2022-01-18 05:08:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:28,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:28,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320520434] [2022-01-18 05:08:28,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320520434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356369508] [2022-01-18 05:08:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:28,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:28,298 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 05:08:28,298 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 05:08:28,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:28,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:28,832 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 05:08:28,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:28,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:28,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:29,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356369508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:29,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:29,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:29,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650544976] [2022-01-18 05:08:29,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:29,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:29,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:29,039 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 05:08:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:29,369 INFO L93 Difference]: Finished difference Result 529 states and 1513 transitions. [2022-01-18 05:08:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:29,369 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 05:08:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:29,370 INFO L225 Difference]: With dead ends: 529 [2022-01-18 05:08:29,370 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 05:08:29,370 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 05:08:29,370 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:08:29,370 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 05:08:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 05:08:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2022-01-18 05:08:29,374 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 05:08:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 05:08:29,374 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 05:08:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:29,374 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 05:08:29,374 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 05:08:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 05:08:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:29,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:29,375 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 05:08:29,393 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 05:08:29,575 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 05:08:29,575 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -327897700, now seen corresponding path program 531 times [2022-01-18 05:08:29,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952293343] [2022-01-18 05:08:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:29,662 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 05:08:29,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952293343] [2022-01-18 05:08:29,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952293343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482851091] [2022-01-18 05:08:29,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:29,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:29,664 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 05:08:29,664 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 05:08:29,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:29,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:30,178 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 05:08:30,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:30,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:30,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:30,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482851091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:30,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:30,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:30,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221672262] [2022-01-18 05:08:30,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:30,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:30,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:30,386 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 05:08:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:30,579 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2022-01-18 05:08:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:30,580 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 05:08:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:30,580 INFO L225 Difference]: With dead ends: 451 [2022-01-18 05:08:30,580 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 05:08:30,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 05:08:30,581 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 05:08:30,581 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 05:08:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 05:08:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2022-01-18 05:08:30,583 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 05:08:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2022-01-18 05:08:30,584 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2022-01-18 05:08:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2022-01-18 05:08:30,584 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 05:08:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2022-01-18 05:08:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:30,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:30,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:30,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:30,785 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 05:08:30,785 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1164446016, now seen corresponding path program 532 times [2022-01-18 05:08:30,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:30,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463490623] [2022-01-18 05:08:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:30,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:30,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:30,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463490623] [2022-01-18 05:08:30,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463490623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:30,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629408713] [2022-01-18 05:08:30,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:30,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:30,870 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 05:08:30,870 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 05:08:31,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:31,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:31,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:31,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:31,509 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 27 treesize of output 27 [2022-01-18 05:08:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:31,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629408713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:31,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:31,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:31,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591810943] [2022-01-18 05:08:31,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:31,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:31,577 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 05:08:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:31,787 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2022-01-18 05:08:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:31,788 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 05:08:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:31,788 INFO L225 Difference]: With dead ends: 496 [2022-01-18 05:08:31,788 INFO L226 Difference]: Without dead ends: 490 [2022-01-18 05:08:31,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:08:31,788 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 05:08:31,789 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 05:08:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-18 05:08:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2022-01-18 05:08:31,792 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 05:08:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2022-01-18 05:08:31,792 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2022-01-18 05:08:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:31,792 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2022-01-18 05:08:31,792 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 05:08:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2022-01-18 05:08:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:31,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:31,793 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 05:08:31,810 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 05:08:31,993 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 05:08:31,993 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1140546102, now seen corresponding path program 533 times [2022-01-18 05:08:31,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819450856] [2022-01-18 05:08:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:31,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:32,078 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 05:08:32,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819450856] [2022-01-18 05:08:32,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819450856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582442824] [2022-01-18 05:08:32,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:32,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:32,079 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 05:08:32,080 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 05:08:32,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:32,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:32,556 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 05:08:32,606 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 05:08:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:32,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:32,728 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 05:08:32,799 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 05:08:32,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582442824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:32,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:32,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:32,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936261310] [2022-01-18 05:08:32,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:32,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:32,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:32,799 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 05:08:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:33,069 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2022-01-18 05:08:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:33,069 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 05:08:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:33,070 INFO L225 Difference]: With dead ends: 502 [2022-01-18 05:08:33,070 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 05:08:33,070 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 05:08:33,070 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 05:08:33,070 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 05:08:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 05:08:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2022-01-18 05:08:33,073 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 05:08:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2022-01-18 05:08:33,074 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2022-01-18 05:08:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:33,074 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2022-01-18 05:08:33,074 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 05:08:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2022-01-18 05:08:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:33,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:33,074 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:33,091 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 05:08:33,275 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 05:08:33,275 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash 342588836, now seen corresponding path program 534 times [2022-01-18 05:08:33,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393662473] [2022-01-18 05:08:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:33,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:33,357 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 05:08:33,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:33,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393662473] [2022-01-18 05:08:33,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393662473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:33,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783238076] [2022-01-18 05:08:33,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:33,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:33,359 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 05:08:33,359 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 05:08:33,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:33,881 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 05:08:33,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:33,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:33,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:34,078 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 05:08:34,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783238076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:34,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:34,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:34,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209689811] [2022-01-18 05:08:34,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:34,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:34,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:34,079 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 05:08:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:34,282 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2022-01-18 05:08:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:34,282 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 05:08:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:34,283 INFO L225 Difference]: With dead ends: 471 [2022-01-18 05:08:34,283 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 05:08:34,283 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 05:08:34,283 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 05:08:34,284 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 05:08:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 05:08:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2022-01-18 05:08:34,287 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 05:08:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 05:08:34,287 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 05:08:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:34,287 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 05:08:34,287 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 05:08:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 05:08:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:34,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:34,288 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 05:08:34,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Ended with exit code 0 [2022-01-18 05:08:34,488 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 05:08:34,488 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:34,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1698664262, now seen corresponding path program 535 times [2022-01-18 05:08:34,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:34,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662580399] [2022-01-18 05:08:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:34,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:34,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662580399] [2022-01-18 05:08:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662580399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366180944] [2022-01-18 05:08:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:34,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:34,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:34,602 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 05:08:34,602 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 05:08:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:34,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:35,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:35,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:35,128 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 49 treesize of output 45 [2022-01-18 05:08:35,269 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 05:08:35,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366180944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:35,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:35,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:08:35,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348175933] [2022-01-18 05:08:35,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:35,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:08:35,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:08:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:08:35,270 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 05:08:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:35,461 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2022-01-18 05:08:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:35,461 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 05:08:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:35,461 INFO L225 Difference]: With dead ends: 443 [2022-01-18 05:08:35,462 INFO L226 Difference]: Without dead ends: 431 [2022-01-18 05:08:35,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:08:35,462 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 05:08:35,462 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 05:08:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-18 05:08:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2022-01-18 05:08:35,465 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 05:08:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2022-01-18 05:08:35,465 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2022-01-18 05:08:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:35,465 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2022-01-18 05:08:35,465 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 05:08:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2022-01-18 05:08:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:35,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:35,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:35,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-01-18 05:08:35,666 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 05:08:35,666 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash -957766928, now seen corresponding path program 536 times [2022-01-18 05:08:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:35,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023871388] [2022-01-18 05:08:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:35,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:35,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023871388] [2022-01-18 05:08:35,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023871388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187045537] [2022-01-18 05:08:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:35,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:35,739 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 05:08:35,739 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 05:08:36,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:36,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:36,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:36,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:36,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:36,297 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 49 treesize of output 45 [2022-01-18 05:08:36,432 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 05:08:36,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187045537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:36,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:36,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:08:36,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45101656] [2022-01-18 05:08:36,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:36,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:36,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:36,432 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 05:08:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:36,690 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2022-01-18 05:08:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:36,690 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 05:08:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:36,691 INFO L225 Difference]: With dead ends: 468 [2022-01-18 05:08:36,691 INFO L226 Difference]: Without dead ends: 462 [2022-01-18 05:08:36,691 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 05:08:36,691 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 05:08:36,692 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 05:08:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-18 05:08:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2022-01-18 05:08:36,695 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 05:08:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2022-01-18 05:08:36,695 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2022-01-18 05:08:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:36,695 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2022-01-18 05:08:36,695 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 05:08:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2022-01-18 05:08:36,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:36,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:36,696 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:36,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:36,896 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 05:08:36,896 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash -933867014, now seen corresponding path program 537 times [2022-01-18 05:08:36,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023830860] [2022-01-18 05:08:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:36,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:36,971 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 05:08:36,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023830860] [2022-01-18 05:08:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023830860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187440247] [2022-01-18 05:08:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:36,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:36,972 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 05:08:36,973 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 05:08:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:37,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:37,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:37,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:37,550 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 49 treesize of output 45 [2022-01-18 05:08:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:37,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187440247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:37,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:37,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:37,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817309449] [2022-01-18 05:08:37,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:37,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:37,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:37,681 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 05:08:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:37,856 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2022-01-18 05:08:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:37,856 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 05:08:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:37,857 INFO L225 Difference]: With dead ends: 439 [2022-01-18 05:08:37,857 INFO L226 Difference]: Without dead ends: 439 [2022-01-18 05:08:37,857 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 05:08:37,857 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 05:08:37,857 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 05:08:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-18 05:08:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2022-01-18 05:08:37,860 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 05:08:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-01-18 05:08:37,860 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2022-01-18 05:08:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-01-18 05:08:37,861 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 05:08:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-01-18 05:08:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:37,861 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 05:08:37,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:38,061 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 05:08:38,061 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2069743190, now seen corresponding path program 538 times [2022-01-18 05:08:38,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848575850] [2022-01-18 05:08:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:38,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:38,133 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 05:08:38,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848575850] [2022-01-18 05:08:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848575850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969859153] [2022-01-18 05:08:38,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:38,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:38,135 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 05:08:38,135 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 05:08:38,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:38,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:38,593 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 05:08:38,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:38,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:38,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:38,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969859153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:38,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:38,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:08:38,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439185259] [2022-01-18 05:08:38,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:38,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:08:38,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:08:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:08:38,756 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 05:08:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:38,939 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2022-01-18 05:08:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:38,940 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 05:08:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:38,940 INFO L225 Difference]: With dead ends: 474 [2022-01-18 05:08:38,940 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 05:08:38,940 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 05:08:38,940 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 05:08:38,941 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 05:08:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 05:08:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2022-01-18 05:08:38,944 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 05:08:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2022-01-18 05:08:38,944 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2022-01-18 05:08:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2022-01-18 05:08:38,944 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 05:08:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2022-01-18 05:08:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:38,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:38,945 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:38,962 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 05:08:39,145 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 05:08:39,145 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2093643104, now seen corresponding path program 539 times [2022-01-18 05:08:39,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741990893] [2022-01-18 05:08:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:39,220 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 05:08:39,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741990893] [2022-01-18 05:08:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741990893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140463726] [2022-01-18 05:08:39,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:39,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:39,221 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 05:08:39,221 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 05:08:39,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:39,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:39,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:39,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:39,792 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 05:08:39,873 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 05:08:39,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140463726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:39,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:39,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:39,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525296896] [2022-01-18 05:08:39,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:39,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:39,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:39,874 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 05:08:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:40,111 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2022-01-18 05:08:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:40,111 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 05:08:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:40,112 INFO L225 Difference]: With dead ends: 474 [2022-01-18 05:08:40,112 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 05:08:40,112 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 05:08:40,112 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 05:08:40,112 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 05:08:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 05:08:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2022-01-18 05:08:40,115 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 05:08:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2022-01-18 05:08:40,116 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2022-01-18 05:08:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:40,116 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2022-01-18 05:08:40,116 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 05:08:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2022-01-18 05:08:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:40,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:40,116 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 05:08:40,133 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 05:08:40,317 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 05:08:40,317 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash -718189254, now seen corresponding path program 540 times [2022-01-18 05:08:40,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:40,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402312802] [2022-01-18 05:08:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:40,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:40,396 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 05:08:40,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402312802] [2022-01-18 05:08:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402312802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913438630] [2022-01-18 05:08:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:40,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:40,398 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 05:08:40,405 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 05:08:40,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:40,842 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 05:08:40,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:40,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:40,940 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 27 treesize of output 27 [2022-01-18 05:08:41,021 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 05:08:41,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913438630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:41,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:41,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:41,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734435893] [2022-01-18 05:08:41,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:41,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:41,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:41,022 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 05:08:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:41,214 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2022-01-18 05:08:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:41,214 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 05:08:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:41,215 INFO L225 Difference]: With dead ends: 449 [2022-01-18 05:08:41,215 INFO L226 Difference]: Without dead ends: 449 [2022-01-18 05:08:41,215 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 05:08:41,215 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 05:08:41,215 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 05:08:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-18 05:08:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2022-01-18 05:08:41,218 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 05:08:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 05:08:41,219 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 05:08:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:41,219 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 05:08:41,219 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 05:08:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 05:08:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:41,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:41,220 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 05:08:41,237 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 05:08:41,420 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 05:08:41,420 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 975331284, now seen corresponding path program 541 times [2022-01-18 05:08:41,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:41,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778770267] [2022-01-18 05:08:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:41,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:41,508 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 05:08:41,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778770267] [2022-01-18 05:08:41,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778770267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207250392] [2022-01-18 05:08:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:41,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:41,509 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 05:08:41,510 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 05:08:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:41,998 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 63 treesize of output 49 [2022-01-18 05:08:42,090 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 05:08:42,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:42,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:42,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:42,295 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 05:08:42,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207250392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:42,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:42,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:42,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351345055] [2022-01-18 05:08:42,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:42,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:42,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:42,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:42,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:42,296 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 05:08:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:42,686 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2022-01-18 05:08:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:42,686 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 05:08:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:42,687 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:08:42,687 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 05:08:42,687 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 05:08:42,687 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 05:08:42,688 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 05:08:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 05:08:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2022-01-18 05:08:42,691 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 05:08:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2022-01-18 05:08:42,692 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2022-01-18 05:08:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:42,692 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2022-01-18 05:08:42,692 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 05:08:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2022-01-18 05:08:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:42,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:42,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:42,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Ended with exit code 0 [2022-01-18 05:08:42,892 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 05:08:42,893 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1857408718, now seen corresponding path program 542 times [2022-01-18 05:08:42,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:42,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237857286] [2022-01-18 05:08:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:42,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:42,980 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 05:08:42,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237857286] [2022-01-18 05:08:42,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237857286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374786082] [2022-01-18 05:08:42,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:42,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:42,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:42,981 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 05:08:42,982 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 05:08:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:43,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:43,577 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 05:08:43,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:43,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:43,716 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 24 treesize of output 24 [2022-01-18 05:08:43,759 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 05:08:43,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374786082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:43,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:43,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:43,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905924721] [2022-01-18 05:08:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:43,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:43,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:43,760 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 05:08:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:44,103 INFO L93 Difference]: Finished difference Result 639 states and 1798 transitions. [2022-01-18 05:08:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:44,103 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 05:08:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:44,104 INFO L225 Difference]: With dead ends: 639 [2022-01-18 05:08:44,104 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 05:08:44,105 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 05:08:44,105 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 05:08:44,105 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 05:08:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 05:08:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 308. [2022-01-18 05:08:44,109 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 05:08:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2022-01-18 05:08:44,109 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2022-01-18 05:08:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2022-01-18 05:08:44,109 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 05:08:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2022-01-18 05:08:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:44,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:44,110 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 05:08:44,127 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 05:08:44,310 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 05:08:44,310 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1716228618, now seen corresponding path program 543 times [2022-01-18 05:08:44,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:44,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264427958] [2022-01-18 05:08:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:44,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:44,401 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 05:08:44,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264427958] [2022-01-18 05:08:44,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264427958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:44,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725334265] [2022-01-18 05:08:44,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:44,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:44,402 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 05:08:44,403 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 05:08:44,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:08:44,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:44,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:44,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:44,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:45,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:45,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:45,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725334265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:45,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:45,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:45,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450808083] [2022-01-18 05:08:45,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:45,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:45,172 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 05:08:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:45,557 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2022-01-18 05:08:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:45,557 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 05:08:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:45,558 INFO L225 Difference]: With dead ends: 668 [2022-01-18 05:08:45,558 INFO L226 Difference]: Without dead ends: 668 [2022-01-18 05:08:45,558 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 05:08:45,559 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 05:08:45,559 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 05:08:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-18 05:08:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2022-01-18 05:08:45,562 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 05:08:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2022-01-18 05:08:45,563 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2022-01-18 05:08:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:45,563 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2022-01-18 05:08:45,563 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 05:08:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2022-01-18 05:08:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:45,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:45,564 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:45,580 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 05:08:45,764 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 05:08:45,764 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1584363058, now seen corresponding path program 544 times [2022-01-18 05:08:45,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544641500] [2022-01-18 05:08:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:45,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:45,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544641500] [2022-01-18 05:08:45,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544641500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988433498] [2022-01-18 05:08:45,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:45,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:45,858 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 05:08:45,858 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 05:08:46,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:46,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:46,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:46,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:46,574 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 24 treesize of output 24 [2022-01-18 05:08:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988433498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:46,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:46,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625546314] [2022-01-18 05:08:46,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:46,618 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 05:08:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:47,130 INFO L93 Difference]: Finished difference Result 664 states and 1884 transitions. [2022-01-18 05:08:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:47,131 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 05:08:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:47,132 INFO L225 Difference]: With dead ends: 664 [2022-01-18 05:08:47,132 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 05:08:47,132 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 05:08:47,132 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 05:08:47,132 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 05:08:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 05:08:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 308. [2022-01-18 05:08:47,136 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 05:08:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2022-01-18 05:08:47,136 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2022-01-18 05:08:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:47,137 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2022-01-18 05:08:47,137 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 05:08:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2022-01-18 05:08:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:47,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:47,137 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 05:08:47,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:47,337 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 05:08:47,338 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash -603909926, now seen corresponding path program 545 times [2022-01-18 05:08:47,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:47,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521334669] [2022-01-18 05:08:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:47,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:47,424 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 05:08:47,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521334669] [2022-01-18 05:08:47,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521334669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:47,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682391307] [2022-01-18 05:08:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:47,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:47,425 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 05:08:47,425 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 05:08:47,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:47,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:47,886 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 57 treesize of output 45 [2022-01-18 05:08:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:48,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:48,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:48,133 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 05:08:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682391307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:48,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621702257] [2022-01-18 05:08:48,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:48,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:48,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:48,134 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 05:08:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:48,489 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2022-01-18 05:08:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:48,489 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 05:08:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:48,490 INFO L225 Difference]: With dead ends: 656 [2022-01-18 05:08:48,490 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 05:08:48,490 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 05:08:48,490 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 05:08:48,490 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 05:08:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 05:08:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2022-01-18 05:08:48,494 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 05:08:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2022-01-18 05:08:48,494 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2022-01-18 05:08:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:48,494 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2022-01-18 05:08:48,494 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 05:08:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2022-01-18 05:08:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:48,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:48,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:48,511 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 05:08:48,695 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 05:08:48,695 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash -580010012, now seen corresponding path program 546 times [2022-01-18 05:08:48,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839729278] [2022-01-18 05:08:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:48,784 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 05:08:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839729278] [2022-01-18 05:08:48,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839729278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072230805] [2022-01-18 05:08:48,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:48,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:48,785 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 05:08:48,785 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 05:08:49,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:49,259 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 57 treesize of output 45 [2022-01-18 05:08:49,327 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 05:08:49,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:49,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:49,483 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 24 treesize of output 24 [2022-01-18 05:08:49,524 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 05:08:49,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072230805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:49,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:49,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:49,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127124399] [2022-01-18 05:08:49,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:49,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:49,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:49,533 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 05:08:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:50,021 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2022-01-18 05:08:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 05:08:50,021 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 05:08:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:50,022 INFO L225 Difference]: With dead ends: 662 [2022-01-18 05:08:50,022 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 05:08:50,022 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 05:08:50,022 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 05:08:50,022 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 05:08:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 05:08:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2022-01-18 05:08:50,026 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 05:08:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 05:08:50,027 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 05:08:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:50,027 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 05:08:50,027 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 05:08:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 05:08:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:50,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:50,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:50,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Forceful destruction successful, exit code 0 [2022-01-18 05:08:50,227 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 05:08:50,228 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 448771440, now seen corresponding path program 547 times [2022-01-18 05:08:50,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809030623] [2022-01-18 05:08:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:50,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:50,318 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 05:08:50,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809030623] [2022-01-18 05:08:50,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809030623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042815492] [2022-01-18 05:08:50,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:50,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:50,320 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 05:08:50,320 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 05:08:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:50,806 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 27 treesize of output 21 [2022-01-18 05:08:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:50,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:51,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:51,019 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 24 [2022-01-18 05:08:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042815492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:51,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:51,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:51,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827281497] [2022-01-18 05:08:51,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:51,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:51,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:51,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:51,064 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 05:08:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:51,304 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2022-01-18 05:08:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:51,304 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 05:08:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:51,305 INFO L225 Difference]: With dead ends: 613 [2022-01-18 05:08:51,305 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 05:08:51,305 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 05:08:51,305 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 05:08:51,305 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 05:08:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 05:08:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2022-01-18 05:08:51,309 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 05:08:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2022-01-18 05:08:51,310 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2022-01-18 05:08:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:51,310 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2022-01-18 05:08:51,310 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 05:08:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2022-01-18 05:08:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:51,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:51,310 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 05:08:51,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-01-18 05:08:51,519 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 05:08:51,520 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:51,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1443147060, now seen corresponding path program 548 times [2022-01-18 05:08:51,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:51,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317942100] [2022-01-18 05:08:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:51,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:51,609 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 05:08:51,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317942100] [2022-01-18 05:08:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317942100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996648537] [2022-01-18 05:08:51,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:51,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:51,611 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 05:08:51,611 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 05:08:51,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:52,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:52,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:52,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:52,316 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 24 treesize of output 24 [2022-01-18 05:08:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:52,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996648537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:52,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:52,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:52,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86633132] [2022-01-18 05:08:52,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:52,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:52,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:52,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:52,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:52,361 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 05:08:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:52,726 INFO L93 Difference]: Finished difference Result 634 states and 1820 transitions. [2022-01-18 05:08:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:08:52,726 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 05:08:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:52,727 INFO L225 Difference]: With dead ends: 634 [2022-01-18 05:08:52,727 INFO L226 Difference]: Without dead ends: 634 [2022-01-18 05:08:52,727 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 05:08:52,727 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 05:08:52,727 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 05:08:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-18 05:08:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 312. [2022-01-18 05:08:52,731 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 05:08:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2022-01-18 05:08:52,731 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2022-01-18 05:08:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:52,731 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2022-01-18 05:08:52,732 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 05:08:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2022-01-18 05:08:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:52,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:52,732 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 05:08:52,749 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 05:08:52,932 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 05:08:52,932 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1147719878, now seen corresponding path program 549 times [2022-01-18 05:08:52,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:52,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160296280] [2022-01-18 05:08:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:52,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:53,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160296280] [2022-01-18 05:08:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160296280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362006265] [2022-01-18 05:08:53,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:08:53,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:53,021 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 05:08:53,022 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 05:08:53,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:08:53,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:53,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:53,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:53,705 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 24 treesize of output 24 [2022-01-18 05:08:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:53,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362006265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:53,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:53,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:53,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946743979] [2022-01-18 05:08:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:53,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:53,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:53,749 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 05:08:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:54,028 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2022-01-18 05:08:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:54,029 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 05:08:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:54,030 INFO L225 Difference]: With dead ends: 556 [2022-01-18 05:08:54,030 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 05:08:54,030 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 05:08:54,030 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 05:08:54,030 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 05:08:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 05:08:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2022-01-18 05:08:54,033 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 05:08:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2022-01-18 05:08:54,034 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2022-01-18 05:08:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:54,034 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2022-01-18 05:08:54,034 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 05:08:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2022-01-18 05:08:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:54,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:54,034 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 05:08:54,051 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 05:08:54,235 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 05:08:54,235 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash 311171562, now seen corresponding path program 550 times [2022-01-18 05:08:54,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:54,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282400714] [2022-01-18 05:08:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:54,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:54,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282400714] [2022-01-18 05:08:54,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282400714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783360267] [2022-01-18 05:08:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:08:54,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:54,318 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 05:08:54,319 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 05:08:54,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:08:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:54,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:54,838 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 05:08:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:54,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:54,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:55,011 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 05:08:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783360267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:55,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 05:08:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386979609] [2022-01-18 05:08:55,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:55,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:08:55,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:08:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:08:55,012 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 05:08:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:55,264 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2022-01-18 05:08:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:55,264 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 05:08:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:55,265 INFO L225 Difference]: With dead ends: 595 [2022-01-18 05:08:55,265 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 05:08:55,265 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 05:08:55,265 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 05:08:55,265 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 05:08:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 05:08:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2022-01-18 05:08:55,269 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 05:08:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2022-01-18 05:08:55,269 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2022-01-18 05:08:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:55,269 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2022-01-18 05:08:55,270 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 05:08:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2022-01-18 05:08:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:55,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:55,270 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 05:08:55,287 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 05:08:55,470 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 05:08:55,470 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 335071476, now seen corresponding path program 551 times [2022-01-18 05:08:55,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911050457] [2022-01-18 05:08:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:55,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:55,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911050457] [2022-01-18 05:08:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911050457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844138323] [2022-01-18 05:08:55,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:08:55,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:55,559 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 05:08:55,559 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 05:08:55,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:08:55,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:56,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:08:56,112 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 05:08:56,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:56,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:56,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:08:56,304 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 05:08:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844138323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:56,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:56,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:56,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117988717] [2022-01-18 05:08:56,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:56,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:56,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:56,305 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 05:08:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:56,573 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2022-01-18 05:08:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:08:56,573 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 05:08:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:56,574 INFO L225 Difference]: With dead ends: 601 [2022-01-18 05:08:56,574 INFO L226 Difference]: Without dead ends: 601 [2022-01-18 05:08:56,574 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 05:08:56,574 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 05:08:56,574 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 05:08:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-18 05:08:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2022-01-18 05:08:56,578 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 05:08:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2022-01-18 05:08:56,578 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2022-01-18 05:08:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:56,578 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2022-01-18 05:08:56,578 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 05:08:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2022-01-18 05:08:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:56,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:56,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:56,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Ended with exit code 0 [2022-01-18 05:08:56,779 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 05:08:56,779 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1818206414, now seen corresponding path program 552 times [2022-01-18 05:08:56,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:56,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668147767] [2022-01-18 05:08:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:56,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:56,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668147767] [2022-01-18 05:08:56,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668147767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409294903] [2022-01-18 05:08:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:08:56,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:56,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:56,865 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 05:08:56,866 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 05:08:57,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:08:57,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:57,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:57,386 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 05:08:57,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:57,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:57,526 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 24 treesize of output 24 [2022-01-18 05:08:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:57,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409294903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:57,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:57,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766108523] [2022-01-18 05:08:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:57,570 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 05:08:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:57,824 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2022-01-18 05:08:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:57,824 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 05:08:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:57,825 INFO L225 Difference]: With dead ends: 576 [2022-01-18 05:08:57,825 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 05:08:57,825 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 05:08:57,825 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 05:08:57,825 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 05:08:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 05:08:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2022-01-18 05:08:57,828 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 05:08:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2022-01-18 05:08:57,829 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2022-01-18 05:08:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:57,829 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2022-01-18 05:08:57,829 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 05:08:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2022-01-18 05:08:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:57,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:57,830 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 05:08:57,846 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 05:08:58,030 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 05:08:58,030 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -612006650, now seen corresponding path program 553 times [2022-01-18 05:08:58,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:58,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248421592] [2022-01-18 05:08:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:58,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:58,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248421592] [2022-01-18 05:08:58,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248421592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14789096] [2022-01-18 05:08:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:08:58,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:58,118 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 05:08:58,118 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 05:08:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:58,596 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 27 treesize of output 21 [2022-01-18 05:08:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:58,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:08:58,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:08:58,806 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 24 treesize of output 24 [2022-01-18 05:08:58,860 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 05:08:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14789096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:08:58,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:08:58,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:08:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240903978] [2022-01-18 05:08:58,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:08:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:08:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:08:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:08:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:08:58,860 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 05:08:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:08:59,136 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2022-01-18 05:08:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:08:59,136 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 05:08:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:08:59,137 INFO L225 Difference]: With dead ends: 600 [2022-01-18 05:08:59,137 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 05:08:59,137 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 05:08:59,137 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 05:08:59,137 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 05:08:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 05:08:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2022-01-18 05:08:59,141 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 05:08:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2022-01-18 05:08:59,141 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2022-01-18 05:08:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:08:59,141 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2022-01-18 05:08:59,142 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 05:08:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2022-01-18 05:08:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:08:59,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:08:59,142 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:08:59,159 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 05:08:59,342 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 05:08:59,342 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:08:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:08:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 382368970, now seen corresponding path program 554 times [2022-01-18 05:08:59,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:08:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667007877] [2022-01-18 05:08:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:08:59,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:08:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:08:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:59,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:08:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667007877] [2022-01-18 05:08:59,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667007877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:08:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955638368] [2022-01-18 05:08:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:08:59,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:08:59,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:08:59,427 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 05:08:59,427 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 05:08:59,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:08:59,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:08:59,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:08:59,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:08:59,907 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 27 treesize of output 21 [2022-01-18 05:08:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:08:59,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:00,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:00,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:00,160 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 05:09:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955638368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:00,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:00,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:09:00,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694698122] [2022-01-18 05:09:00,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:00,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:00,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:00,161 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 05:09:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:00,549 INFO L93 Difference]: Finished difference Result 635 states and 1813 transitions. [2022-01-18 05:09:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:09:00,549 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 05:09:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:00,550 INFO L225 Difference]: With dead ends: 635 [2022-01-18 05:09:00,550 INFO L226 Difference]: Without dead ends: 635 [2022-01-18 05:09:00,550 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 05:09:00,550 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 05:09:00,550 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 05:09:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-18 05:09:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 310. [2022-01-18 05:09:00,554 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 05:09:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2022-01-18 05:09:00,554 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2022-01-18 05:09:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:00,555 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2022-01-18 05:09:00,555 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 05:09:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2022-01-18 05:09:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:00,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:00,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:00,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:00,755 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 05:09:00,756 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash 86941788, now seen corresponding path program 555 times [2022-01-18 05:09:00,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990055524] [2022-01-18 05:09:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:00,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:00,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990055524] [2022-01-18 05:09:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990055524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915131563] [2022-01-18 05:09:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:00,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:00,843 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 05:09:00,843 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 05:09:01,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:01,361 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 05:09:01,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:01,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:01,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915131563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:01,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:01,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-18 05:09:01,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561236637] [2022-01-18 05:09:01,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:01,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 05:09:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 05:09:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 05:09:01,560 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 05:09:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:01,820 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2022-01-18 05:09:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:01,821 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 05:09:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:01,821 INFO L225 Difference]: With dead ends: 547 [2022-01-18 05:09:01,821 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 05:09:01,822 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 05:09:01,822 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 05:09:01,822 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 05:09:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 05:09:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2022-01-18 05:09:01,825 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 05:09:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2022-01-18 05:09:01,826 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2022-01-18 05:09:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:01,826 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2022-01-18 05:09:01,826 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 05:09:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2022-01-18 05:09:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:01,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:01,826 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 05:09:01,844 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 05:09:02,027 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 05:09:02,027 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -675145266, now seen corresponding path program 556 times [2022-01-18 05:09:02,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013195637] [2022-01-18 05:09:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:02,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:02,120 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 05:09:02,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013195637] [2022-01-18 05:09:02,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013195637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825959450] [2022-01-18 05:09:02,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:02,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:02,121 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 05:09:02,122 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 05:09:02,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:02,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:02,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:02,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:02,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825959450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:02,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:09:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288252065] [2022-01-18 05:09:02,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:02,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:02,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:02,776 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 05:09:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:03,029 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2022-01-18 05:09:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:03,029 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 05:09:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:03,030 INFO L225 Difference]: With dead ends: 570 [2022-01-18 05:09:03,030 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 05:09:03,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-18 05:09:03,031 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 05:09:03,031 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 05:09:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 05:09:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2022-01-18 05:09:03,034 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 05:09:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2022-01-18 05:09:03,035 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2022-01-18 05:09:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2022-01-18 05:09:03,035 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 05:09:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2022-01-18 05:09:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:03,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:03,035 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 05:09:03,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Ended with exit code 0 [2022-01-18 05:09:03,235 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 05:09:03,236 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1810384618, now seen corresponding path program 557 times [2022-01-18 05:09:03,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:03,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358751862] [2022-01-18 05:09:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:03,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:03,310 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 05:09:03,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358751862] [2022-01-18 05:09:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358751862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722953357] [2022-01-18 05:09:03,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:03,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:03,311 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 05:09:03,311 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 05:09:03,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:03,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:03,816 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 05:09:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:03,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:03,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:03,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722953357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:03,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:03,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:09:03,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327619598] [2022-01-18 05:09:03,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:03,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:09:03,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:09:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:09:03,980 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 05:09:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:04,252 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2022-01-18 05:09:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:04,252 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 05:09:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:04,253 INFO L225 Difference]: With dead ends: 635 [2022-01-18 05:09:04,253 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 05:09:04,253 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 05:09:04,253 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 05:09:04,253 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 05:09:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 05:09:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2022-01-18 05:09:04,257 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 05:09:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2022-01-18 05:09:04,257 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2022-01-18 05:09:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:04,257 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2022-01-18 05:09:04,257 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 05:09:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2022-01-18 05:09:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:04,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:04,258 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:04,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Ended with exit code 0 [2022-01-18 05:09:04,458 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 05:09:04,458 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1786484704, now seen corresponding path program 558 times [2022-01-18 05:09:04,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:04,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677166052] [2022-01-18 05:09:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:04,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:04,538 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 05:09:04,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677166052] [2022-01-18 05:09:04,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677166052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860699969] [2022-01-18 05:09:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:04,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:04,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:04,539 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 05:09:04,539 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 05:09:04,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:04,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:04,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:05,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:05,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:05,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:05,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:05,220 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 05:09:05,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860699969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:05,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:05,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:09:05,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863315778] [2022-01-18 05:09:05,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:05,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:05,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:05,221 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 05:09:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:05,556 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2022-01-18 05:09:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:05,557 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 05:09:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:05,557 INFO L225 Difference]: With dead ends: 641 [2022-01-18 05:09:05,558 INFO L226 Difference]: Without dead ends: 641 [2022-01-18 05:09:05,558 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 05:09:05,558 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 05:09:05,558 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 05:09:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-18 05:09:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2022-01-18 05:09:05,562 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 05:09:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2022-01-18 05:09:05,562 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2022-01-18 05:09:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2022-01-18 05:09:05,562 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 05:09:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2022-01-18 05:09:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:05,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:05,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:05,580 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 05:09:05,763 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 05:09:05,763 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -303349766, now seen corresponding path program 559 times [2022-01-18 05:09:05,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226599096] [2022-01-18 05:09:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:05,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:05,838 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 05:09:05,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226599096] [2022-01-18 05:09:05,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226599096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380474621] [2022-01-18 05:09:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:05,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:05,840 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 05:09:05,840 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 05:09:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:06,332 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 05:09:06,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:06,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:06,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:06,493 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 05:09:06,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380474621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:06,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:06,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 05:09:06,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984841461] [2022-01-18 05:09:06,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:06,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:06,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:06,494 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 05:09:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:06,770 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2022-01-18 05:09:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:06,770 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 05:09:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:06,771 INFO L225 Difference]: With dead ends: 624 [2022-01-18 05:09:06,771 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 05:09:06,771 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 05:09:06,771 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 05:09:06,771 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 05:09:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 05:09:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2022-01-18 05:09:06,775 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 05:09:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2022-01-18 05:09:06,776 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2022-01-18 05:09:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2022-01-18 05:09:06,776 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 05:09:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2022-01-18 05:09:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:06,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:06,776 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 05:09:06,811 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 05:09:06,987 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 05:09:06,987 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1879188900, now seen corresponding path program 560 times [2022-01-18 05:09:06,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:06,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323580675] [2022-01-18 05:09:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:06,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:07,065 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 05:09:07,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323580675] [2022-01-18 05:09:07,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323580675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362717956] [2022-01-18 05:09:07,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:07,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:07,066 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 05:09:07,066 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 05:09:07,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:07,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:07,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:07,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:07,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:07,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:07,710 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 05:09:07,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362717956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:07,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:07,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:07,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732024146] [2022-01-18 05:09:07,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:07,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:07,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:07,711 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 05:09:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:07,991 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2022-01-18 05:09:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:07,991 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 05:09:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:07,992 INFO L225 Difference]: With dead ends: 649 [2022-01-18 05:09:07,992 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 05:09:07,992 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 05:09:07,992 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 05:09:07,992 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 05:09:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 05:09:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2022-01-18 05:09:07,996 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 05:09:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2022-01-18 05:09:07,997 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2022-01-18 05:09:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:07,997 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2022-01-18 05:09:07,997 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 05:09:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2022-01-18 05:09:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:07,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:07,997 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 05:09:08,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:08,197 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 05:09:08,198 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1252570894, now seen corresponding path program 561 times [2022-01-18 05:09:08,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:08,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875545149] [2022-01-18 05:09:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:08,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:08,260 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 05:09:08,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875545149] [2022-01-18 05:09:08,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875545149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096661210] [2022-01-18 05:09:08,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:08,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:08,261 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 05:09:08,262 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 05:09:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:08,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:08,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:08,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:08,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:08,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:08,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096661210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:08,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:08,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:08,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991097635] [2022-01-18 05:09:08,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:08,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:08,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:08,887 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 05:09:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:09,090 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2022-01-18 05:09:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:09,090 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 05:09:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:09,091 INFO L225 Difference]: With dead ends: 446 [2022-01-18 05:09:09,091 INFO L226 Difference]: Without dead ends: 434 [2022-01-18 05:09:09,091 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 05:09:09,091 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 05:09:09,091 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 05:09:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-18 05:09:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2022-01-18 05:09:09,094 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 05:09:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2022-01-18 05:09:09,094 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2022-01-18 05:09:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2022-01-18 05:09:09,094 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 05:09:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2022-01-18 05:09:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:09,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:09,095 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:09,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Ended with exit code 0 [2022-01-18 05:09:09,295 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 05:09:09,295 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1993468228, now seen corresponding path program 562 times [2022-01-18 05:09:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910261452] [2022-01-18 05:09:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:09,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:09,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:09,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910261452] [2022-01-18 05:09:09,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910261452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:09,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121013727] [2022-01-18 05:09:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:09,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:09,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:09,361 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 05:09:09,361 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 05:09:09,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:09,778 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 05:09:09,844 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 05:09:09,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:09,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:09,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:10,018 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 05:09:10,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121013727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:10,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:10,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:10,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97041582] [2022-01-18 05:09:10,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:10,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:10,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:10,019 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 05:09:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:10,275 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2022-01-18 05:09:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:09:10,275 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 05:09:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:10,276 INFO L225 Difference]: With dead ends: 471 [2022-01-18 05:09:10,276 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 05:09:10,276 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 05:09:10,276 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 05:09:10,276 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 05:09:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 05:09:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2022-01-18 05:09:10,279 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 05:09:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-01-18 05:09:10,280 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2022-01-18 05:09:10,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:10,280 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-01-18 05:09:10,280 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 05:09:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-01-18 05:09:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:10,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:10,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:10,297 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 05:09:10,480 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 05:09:10,481 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2017368142, now seen corresponding path program 563 times [2022-01-18 05:09:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921062349] [2022-01-18 05:09:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:10,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:10,547 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 05:09:10,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921062349] [2022-01-18 05:09:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921062349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477219151] [2022-01-18 05:09:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:10,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:10,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:10,548 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 05:09:10,549 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 05:09:10,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:10,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:11,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:11,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:11,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:11,221 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 05:09:11,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477219151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:11,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:11,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:09:11,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875276756] [2022-01-18 05:09:11,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:09:11,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:09:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:09:11,221 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 05:09:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:11,471 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2022-01-18 05:09:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:11,472 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 05:09:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:11,472 INFO L225 Difference]: With dead ends: 442 [2022-01-18 05:09:11,472 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 05:09:11,472 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 05:09:11,473 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:11,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 147 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 05:09:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2022-01-18 05:09:11,476 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 05:09:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2022-01-18 05:09:11,476 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2022-01-18 05:09:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:11,476 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2022-01-18 05:09:11,476 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 05:09:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2022-01-18 05:09:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:11,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:11,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:11,493 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 05:09:11,677 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 05:09:11,677 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 726011050, now seen corresponding path program 564 times [2022-01-18 05:09:11,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:11,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918769297] [2022-01-18 05:09:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:11,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:11,740 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 05:09:11,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918769297] [2022-01-18 05:09:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918769297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671649286] [2022-01-18 05:09:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:11,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:11,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:11,741 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 05:09:11,742 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 05:09:12,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:12,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:12,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:12,192 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 05:09:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:12,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:12,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:12,340 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 05:09:12,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671649286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:12,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:12,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:12,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286554179] [2022-01-18 05:09:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:12,341 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 05:09:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:12,546 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2022-01-18 05:09:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:12,546 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 05:09:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:12,546 INFO L225 Difference]: With dead ends: 477 [2022-01-18 05:09:12,547 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 05:09:12,547 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 05:09:12,547 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 05:09:12,547 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 05:09:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 05:09:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2022-01-18 05:09:12,550 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 05:09:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2022-01-18 05:09:12,551 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2022-01-18 05:09:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:12,551 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2022-01-18 05:09:12,551 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 05:09:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2022-01-18 05:09:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:12,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:12,551 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:12,568 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 05:09:12,751 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 05:09:12,752 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash 749910964, now seen corresponding path program 565 times [2022-01-18 05:09:12,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:12,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524455674] [2022-01-18 05:09:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:12,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:12,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524455674] [2022-01-18 05:09:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524455674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199747792] [2022-01-18 05:09:12,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:12,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:12,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:12,819 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 05:09:12,819 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 05:09:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:13,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:13,272 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 05:09:13,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:13,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:13,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:13,420 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 05:09:13,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199747792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:13,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:13,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:09:13,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273905155] [2022-01-18 05:09:13,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:13,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:09:13,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:09:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:09:13,421 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 05:09:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:13,620 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2022-01-18 05:09:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:13,620 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 05:09:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:13,621 INFO L225 Difference]: With dead ends: 477 [2022-01-18 05:09:13,621 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 05:09:13,621 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 05:09:13,621 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 05:09:13,621 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 05:09:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 05:09:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2022-01-18 05:09:13,624 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 05:09:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2022-01-18 05:09:13,625 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2022-01-18 05:09:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:13,625 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2022-01-18 05:09:13,625 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 05:09:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2022-01-18 05:09:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:13,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:13,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:13,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:13,826 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 05:09:13,826 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2061921394, now seen corresponding path program 566 times [2022-01-18 05:09:13,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:13,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28506170] [2022-01-18 05:09:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:13,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:13,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:13,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28506170] [2022-01-18 05:09:13,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28506170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:13,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687216738] [2022-01-18 05:09:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:13,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:13,894 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 05:09:13,894 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 05:09:14,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:14,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:14,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:14,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:14,470 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 05:09:14,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687216738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:14,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:14,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 05:09:14,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399073202] [2022-01-18 05:09:14,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:14,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 05:09:14,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 05:09:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 05:09:14,470 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 05:09:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:14,716 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2022-01-18 05:09:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:14,716 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 05:09:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:14,717 INFO L225 Difference]: With dead ends: 452 [2022-01-18 05:09:14,717 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 05:09:14,717 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 05:09:14,717 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 05:09:14,717 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 05:09:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 05:09:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2022-01-18 05:09:14,720 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 05:09:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2022-01-18 05:09:14,720 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2022-01-18 05:09:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:14,721 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2022-01-18 05:09:14,721 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 05:09:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2022-01-18 05:09:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:14,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:14,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:14,738 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 05:09:14,921 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 05:09:14,921 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -334767040, now seen corresponding path program 567 times [2022-01-18 05:09:14,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:14,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112816889] [2022-01-18 05:09:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:14,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:14,986 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 05:09:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112816889] [2022-01-18 05:09:14,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112816889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849461932] [2022-01-18 05:09:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:14,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:14,987 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 05:09:14,987 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 05:09:15,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:15,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:15,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:15,432 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 05:09:15,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:15,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:15,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:15,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849461932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:15,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:15,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:15,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608989753] [2022-01-18 05:09:15,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:15,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:15,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:15,565 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 05:09:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:15,756 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2022-01-18 05:09:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:15,757 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 05:09:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:15,757 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:09:15,757 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 05:09:15,758 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 05:09:15,758 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 05:09:15,758 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 05:09:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 05:09:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2022-01-18 05:09:15,761 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 05:09:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2022-01-18 05:09:15,762 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2022-01-18 05:09:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:15,762 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2022-01-18 05:09:15,762 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 05:09:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2022-01-18 05:09:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:15,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:15,762 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:15,780 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 05:09:15,963 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 05:09:15,963 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -310867126, now seen corresponding path program 568 times [2022-01-18 05:09:15,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:15,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804289789] [2022-01-18 05:09:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:15,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:16,032 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 05:09:16,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804289789] [2022-01-18 05:09:16,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804289789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:16,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748013216] [2022-01-18 05:09:16,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:16,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:16,033 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 05:09:16,034 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 05:09:16,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:16,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:16,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:16,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:16,585 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 24 treesize of output 24 [2022-01-18 05:09:16,628 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 05:09:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748013216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:16,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:16,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:16,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341132896] [2022-01-18 05:09:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:16,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:16,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:16,628 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 05:09:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:16,900 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2022-01-18 05:09:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:16,900 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 05:09:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:16,901 INFO L225 Difference]: With dead ends: 536 [2022-01-18 05:09:16,901 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 05:09:16,901 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 05:09:16,901 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 05:09:16,901 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 05:09:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 05:09:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2022-01-18 05:09:16,905 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 05:09:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2022-01-18 05:09:16,905 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2022-01-18 05:09:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:16,905 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2022-01-18 05:09:16,906 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 05:09:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2022-01-18 05:09:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:16,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:16,906 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 05:09:16,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-01-18 05:09:17,106 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 05:09:17,106 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:17,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1172267812, now seen corresponding path program 569 times [2022-01-18 05:09:17,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:17,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368511532] [2022-01-18 05:09:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:17,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:17,174 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 05:09:17,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368511532] [2022-01-18 05:09:17,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368511532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584401855] [2022-01-18 05:09:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:17,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:17,176 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 05:09:17,176 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 05:09:17,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:17,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:17,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:17,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:17,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584401855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:17,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:17,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:17,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283238844] [2022-01-18 05:09:17,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:17,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:17,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:17,752 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 05:09:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:17,961 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2022-01-18 05:09:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:17,961 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 05:09:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:17,962 INFO L225 Difference]: With dead ends: 525 [2022-01-18 05:09:17,962 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 05:09:17,962 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 05:09:17,962 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 05:09:17,962 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 05:09:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 05:09:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2022-01-18 05:09:17,965 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 05:09:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2022-01-18 05:09:17,966 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2022-01-18 05:09:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:17,966 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2022-01-18 05:09:17,966 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 05:09:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2022-01-18 05:09:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:17,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:17,967 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 05:09:17,984 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 05:09:18,167 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 05:09:18,167 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash -940160818, now seen corresponding path program 570 times [2022-01-18 05:09:18,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30278889] [2022-01-18 05:09:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:18,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:18,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30278889] [2022-01-18 05:09:18,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30278889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591358251] [2022-01-18 05:09:18,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:18,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:18,230 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 05:09:18,230 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 05:09:18,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:18,632 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 05:09:18,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:18,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:18,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:18,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591358251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:18,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:18,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:18,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964376067] [2022-01-18 05:09:18,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:18,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:18,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:18,757 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 05:09:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:18,977 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2022-01-18 05:09:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:18,978 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 05:09:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:18,979 INFO L225 Difference]: With dead ends: 515 [2022-01-18 05:09:18,979 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 05:09:18,979 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 05:09:18,979 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 05:09:18,979 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 05:09:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 05:09:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2022-01-18 05:09:18,982 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 05:09:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2022-01-18 05:09:18,983 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2022-01-18 05:09:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2022-01-18 05:09:18,983 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 05:09:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2022-01-18 05:09:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:18,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:18,983 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 05:09:19,001 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 05:09:19,184 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 05:09:19,184 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1400890582, now seen corresponding path program 571 times [2022-01-18 05:09:19,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768881409] [2022-01-18 05:09:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:19,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:19,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768881409] [2022-01-18 05:09:19,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768881409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524084687] [2022-01-18 05:09:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:19,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:19,239 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 05:09:19,239 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 05:09:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:19,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:19,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:19,667 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 05:09:19,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:19,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:19,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:19,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524084687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:19,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:19,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 05:09:19,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501119126] [2022-01-18 05:09:19,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:19,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:09:19,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:09:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:09:19,787 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 05:09:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:19,992 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2022-01-18 05:09:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:19,992 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 05:09:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:19,993 INFO L225 Difference]: With dead ends: 491 [2022-01-18 05:09:19,993 INFO L226 Difference]: Without dead ends: 473 [2022-01-18 05:09:19,993 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 05:09:19,993 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 05:09:19,993 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 05:09:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-18 05:09:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2022-01-18 05:09:19,996 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 05:09:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 05:09:19,997 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 05:09:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 05:09:19,997 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 05:09:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 05:09:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:19,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:19,997 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 05:09:20,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:20,197 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 05:09:20,198 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1304206338, now seen corresponding path program 572 times [2022-01-18 05:09:20,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058684944] [2022-01-18 05:09:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:20,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:20,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058684944] [2022-01-18 05:09:20,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058684944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752879680] [2022-01-18 05:09:20,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:20,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:20,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:20,256 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 05:09:20,257 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 05:09:20,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:20,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:20,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:20,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:20,784 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 49 treesize of output 45 [2022-01-18 05:09:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752879680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:20,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929913654] [2022-01-18 05:09:20,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:20,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:20,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:20,851 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 05:09:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:21,121 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2022-01-18 05:09:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:21,121 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 05:09:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:21,122 INFO L225 Difference]: With dead ends: 487 [2022-01-18 05:09:21,122 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 05:09:21,122 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 05:09:21,122 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 05:09:21,122 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 05:09:21,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 05:09:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2022-01-18 05:09:21,126 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 05:09:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 05:09:21,126 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 05:09:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:21,126 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 05:09:21,126 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 05:09:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 05:09:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:21,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:21,127 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:21,144 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 05:09:21,327 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 05:09:21,327 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -563309004, now seen corresponding path program 573 times [2022-01-18 05:09:21,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755783377] [2022-01-18 05:09:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:21,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:21,386 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 05:09:21,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755783377] [2022-01-18 05:09:21,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755783377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644239025] [2022-01-18 05:09:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:21,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:21,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:21,388 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 05:09:21,388 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 05:09:21,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:21,811 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 75 treesize of output 59 [2022-01-18 05:09:21,867 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 05:09:21,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:21,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:21,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:22,012 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 05:09:22,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644239025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:22,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:22,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119400042] [2022-01-18 05:09:22,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:22,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:22,013 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 05:09:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:22,435 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2022-01-18 05:09:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:09:22,435 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 05:09:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:22,436 INFO L225 Difference]: With dead ends: 512 [2022-01-18 05:09:22,436 INFO L226 Difference]: Without dead ends: 506 [2022-01-18 05:09:22,436 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 05:09:22,436 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 05:09:22,436 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 05:09:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-18 05:09:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2022-01-18 05:09:22,440 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 05:09:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 05:09:22,440 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 05:09:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:22,440 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 05:09:22,440 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 05:09:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 05:09:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:22,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:22,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:22,458 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 05:09:22,641 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 05:09:22,641 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash -539409090, now seen corresponding path program 574 times [2022-01-18 05:09:22,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:22,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972552443] [2022-01-18 05:09:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:22,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:22,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972552443] [2022-01-18 05:09:22,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972552443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388023253] [2022-01-18 05:09:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:22,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:22,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:22,703 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 05:09:22,704 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 05:09:23,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:23,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:23,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:23,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:23,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:23,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:23,275 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 49 treesize of output 45 [2022-01-18 05:09:23,350 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 05:09:23,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388023253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:23,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:23,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 05:09:23,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263571204] [2022-01-18 05:09:23,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 05:09:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 05:09:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:09:23,351 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 05:09:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:23,613 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2022-01-18 05:09:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:23,613 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 05:09:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:23,614 INFO L225 Difference]: With dead ends: 483 [2022-01-18 05:09:23,614 INFO L226 Difference]: Without dead ends: 483 [2022-01-18 05:09:23,614 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 05:09:23,614 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 05:09:23,614 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 05:09:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-18 05:09:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2022-01-18 05:09:23,617 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 05:09:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2022-01-18 05:09:23,618 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2022-01-18 05:09:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:23,618 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2022-01-18 05:09:23,618 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 05:09:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2022-01-18 05:09:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:23,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:23,618 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:23,635 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 05:09:23,818 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 05:09:23,819 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1728517574, now seen corresponding path program 575 times [2022-01-18 05:09:23,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:23,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540944572] [2022-01-18 05:09:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:23,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:23,876 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 05:09:23,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540944572] [2022-01-18 05:09:23,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540944572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773709881] [2022-01-18 05:09:23,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:23,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:23,877 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 05:09:23,877 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 05:09:24,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:24,307 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 05:09:24,325 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 05:09:24,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:24,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:24,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:24,485 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 05:09:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773709881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:24,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:09:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134118754] [2022-01-18 05:09:24,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:24,486 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 05:09:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:24,681 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2022-01-18 05:09:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:24,681 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 05:09:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:24,682 INFO L225 Difference]: With dead ends: 432 [2022-01-18 05:09:24,682 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 05:09:24,682 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 05:09:24,682 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 05:09:24,682 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 05:09:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 05:09:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2022-01-18 05:09:24,685 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 05:09:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 05:09:24,685 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 05:09:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:24,685 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 05:09:24,686 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 05:09:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 05:09:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:24,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:24,686 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:24,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:24,886 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 05:09:24,886 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash -987620240, now seen corresponding path program 576 times [2022-01-18 05:09:24,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133639737] [2022-01-18 05:09:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:24,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:24,943 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 05:09:24,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:24,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133639737] [2022-01-18 05:09:24,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133639737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:24,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117904055] [2022-01-18 05:09:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:24,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:24,944 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 05:09:24,944 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 05:09:25,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:25,351 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 72 treesize of output 56 [2022-01-18 05:09:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:25,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:25,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:25,474 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 49 treesize of output 45 [2022-01-18 05:09:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:25,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117904055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:25,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:25,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:25,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99874721] [2022-01-18 05:09:25,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:25,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:25,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:25,572 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 05:09:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:25,802 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2022-01-18 05:09:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:09:25,803 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 05:09:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:25,803 INFO L225 Difference]: With dead ends: 457 [2022-01-18 05:09:25,803 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 05:09:25,804 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 05:09:25,804 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 05:09:25,804 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 05:09:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 05:09:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2022-01-18 05:09:25,807 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 05:09:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 05:09:25,807 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 05:09:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:25,808 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 05:09:25,808 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 05:09:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 05:09:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:25,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:25,808 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:25,826 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 05:09:26,008 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 05:09:26,009 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash -963720326, now seen corresponding path program 577 times [2022-01-18 05:09:26,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:26,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874559216] [2022-01-18 05:09:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:26,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:26,067 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 05:09:26,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874559216] [2022-01-18 05:09:26,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874559216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683749857] [2022-01-18 05:09:26,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:26,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:26,069 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 05:09:26,069 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 05:09:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:26,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:26,544 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 05:09:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:26,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:26,611 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 05:09:26,710 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 05:09:26,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683749857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:26,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:26,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:26,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81382335] [2022-01-18 05:09:26,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:26,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:26,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:26,711 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 05:09:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:26,944 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2022-01-18 05:09:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:26,944 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 05:09:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:26,945 INFO L225 Difference]: With dead ends: 428 [2022-01-18 05:09:26,945 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 05:09:26,945 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 05:09:26,945 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 05:09:26,945 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 05:09:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 05:09:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2022-01-18 05:09:26,948 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 05:09:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 05:09:26,948 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 05:09:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:26,949 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 05:09:26,949 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 05:09:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 05:09:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:26,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:26,949 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:26,966 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 05:09:27,149 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 05:09:27,149 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2039889878, now seen corresponding path program 578 times [2022-01-18 05:09:27,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:27,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062962860] [2022-01-18 05:09:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:27,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:27,206 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 05:09:27,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062962860] [2022-01-18 05:09:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062962860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576073638] [2022-01-18 05:09:27,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:27,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:27,207 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 05:09:27,208 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 05:09:27,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:27,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:27,651 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 05:09:27,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:27,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:27,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:27,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576073638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:27,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:27,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:27,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494371663] [2022-01-18 05:09:27,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:27,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:27,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:27,777 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 05:09:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:27,963 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2022-01-18 05:09:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:27,963 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 05:09:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:27,964 INFO L225 Difference]: With dead ends: 463 [2022-01-18 05:09:27,964 INFO L226 Difference]: Without dead ends: 457 [2022-01-18 05:09:27,964 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 05:09:27,964 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 05:09:27,964 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 05:09:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-18 05:09:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2022-01-18 05:09:27,968 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 05:09:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2022-01-18 05:09:27,968 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2022-01-18 05:09:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:27,968 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2022-01-18 05:09:27,968 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 05:09:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2022-01-18 05:09:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:27,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:27,969 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 05:09:27,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Ended with exit code 0 [2022-01-18 05:09:28,169 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 05:09:28,169 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2063789792, now seen corresponding path program 579 times [2022-01-18 05:09:28,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:28,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606210097] [2022-01-18 05:09:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:28,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:28,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606210097] [2022-01-18 05:09:28,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606210097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002385580] [2022-01-18 05:09:28,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:28,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:28,229 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 05:09:28,229 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 05:09:28,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:28,621 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 05:09:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:28,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:28,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:28,758 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 27 treesize of output 27 [2022-01-18 05:09:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002385580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:28,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42331763] [2022-01-18 05:09:28,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:28,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:28,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:28,805 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 05:09:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:29,046 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2022-01-18 05:09:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:29,046 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 05:09:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:29,047 INFO L225 Difference]: With dead ends: 463 [2022-01-18 05:09:29,047 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 05:09:29,047 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 05:09:29,047 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 05:09:29,047 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 05:09:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 05:09:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2022-01-18 05:09:29,051 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 05:09:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-01-18 05:09:29,051 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2022-01-18 05:09:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:29,051 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-01-18 05:09:29,051 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 05:09:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-01-18 05:09:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:29,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:29,052 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:29,069 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 05:09:29,252 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 05:09:29,252 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -748042566, now seen corresponding path program 580 times [2022-01-18 05:09:29,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081767284] [2022-01-18 05:09:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:29,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:29,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081767284] [2022-01-18 05:09:29,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081767284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007696203] [2022-01-18 05:09:29,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:29,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:29,312 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 05:09:29,312 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 05:09:29,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:29,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:29,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:29,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:29,852 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 05:09:29,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007696203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:29,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:29,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:29,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292304589] [2022-01-18 05:09:29,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:29,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:29,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:29,853 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 05:09:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:30,053 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2022-01-18 05:09:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:30,054 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 05:09:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:30,054 INFO L225 Difference]: With dead ends: 438 [2022-01-18 05:09:30,054 INFO L226 Difference]: Without dead ends: 438 [2022-01-18 05:09:30,054 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 05:09:30,054 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 05:09:30,055 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 05:09:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-18 05:09:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2022-01-18 05:09:30,057 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 05:09:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 05:09:30,058 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 05:09:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:30,058 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 05:09:30,058 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 05:09:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 05:09:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:30,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:30,058 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:30,076 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 05:09:30,259 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 05:09:30,259 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2028956866, now seen corresponding path program 581 times [2022-01-18 05:09:30,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188516719] [2022-01-18 05:09:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:30,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:30,314 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 05:09:30,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188516719] [2022-01-18 05:09:30,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188516719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526838069] [2022-01-18 05:09:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:30,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:30,315 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 05:09:30,316 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 05:09:30,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:30,760 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 54 treesize of output 42 [2022-01-18 05:09:30,780 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 05:09:30,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:30,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:30,833 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 05:09:30,930 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 05:09:30,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526838069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:30,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:30,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:09:30,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886313343] [2022-01-18 05:09:30,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:30,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:30,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:30,931 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 05:09:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:31,137 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2022-01-18 05:09:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:31,137 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 05:09:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:31,138 INFO L225 Difference]: With dead ends: 422 [2022-01-18 05:09:31,138 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 05:09:31,138 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 05:09:31,138 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 05:09:31,139 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 05:09:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 05:09:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2022-01-18 05:09:31,141 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 05:09:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2022-01-18 05:09:31,142 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2022-01-18 05:09:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2022-01-18 05:09:31,142 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 05:09:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2022-01-18 05:09:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:31,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:31,142 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:31,160 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 05:09:31,343 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 05:09:31,343 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1525113096, now seen corresponding path program 582 times [2022-01-18 05:09:31,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:31,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483223864] [2022-01-18 05:09:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:31,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:31,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483223864] [2022-01-18 05:09:31,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483223864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614954457] [2022-01-18 05:09:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:31,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:31,399 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 05:09:31,399 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 05:09:31,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:31,805 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 72 treesize of output 56 [2022-01-18 05:09:31,871 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 05:09:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:31,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:31,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 05:09:32,035 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 05:09:32,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614954457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:32,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:32,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:32,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458128209] [2022-01-18 05:09:32,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:32,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:32,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:32,036 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 05:09:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:32,299 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2022-01-18 05:09:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:09:32,299 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 05:09:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:32,299 INFO L225 Difference]: With dead ends: 447 [2022-01-18 05:09:32,299 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 05:09:32,300 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 05:09:32,300 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 05:09:32,300 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 05:09:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 05:09:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2022-01-18 05:09:32,303 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 05:09:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2022-01-18 05:09:32,303 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2022-01-18 05:09:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:32,303 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2022-01-18 05:09:32,304 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 05:09:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2022-01-18 05:09:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:32,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:32,304 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:32,321 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 05:09:32,504 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 05:09:32,504 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1501213182, now seen corresponding path program 583 times [2022-01-18 05:09:32,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834480294] [2022-01-18 05:09:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:32,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:32,563 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 05:09:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834480294] [2022-01-18 05:09:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834480294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823687271] [2022-01-18 05:09:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:32,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:32,564 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 05:09:32,564 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 05:09:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:32,972 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 05:09:33,039 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 05:09:33,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:33,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:33,105 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 45 [2022-01-18 05:09:33,203 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 05:09:33,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823687271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:33,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:33,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122462844] [2022-01-18 05:09:33,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:33,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:33,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:33,204 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 05:09:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:33,384 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2022-01-18 05:09:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:33,384 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 05:09:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:33,385 INFO L225 Difference]: With dead ends: 418 [2022-01-18 05:09:33,385 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 05:09:33,385 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 05:09:33,385 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 05:09:33,385 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 05:09:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 05:09:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2022-01-18 05:09:33,388 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 05:09:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2022-01-18 05:09:33,389 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2022-01-18 05:09:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:33,389 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2022-01-18 05:09:33,389 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 05:09:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2022-01-18 05:09:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:33,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:33,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:33,407 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 05:09:33,589 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 05:09:33,590 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1502397022, now seen corresponding path program 584 times [2022-01-18 05:09:33,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:33,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364096075] [2022-01-18 05:09:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:33,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:33,647 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 05:09:33,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364096075] [2022-01-18 05:09:33,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364096075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854864418] [2022-01-18 05:09:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:33,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:33,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:33,648 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 05:09:33,648 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 05:09:33,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:33,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:34,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:34,095 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 05:09:34,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:34,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:34,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:34,220 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 05:09:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854864418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:34,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:34,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:34,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583687963] [2022-01-18 05:09:34,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:34,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:34,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:34,221 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 05:09:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:34,404 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2022-01-18 05:09:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:34,405 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 05:09:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:34,405 INFO L225 Difference]: With dead ends: 453 [2022-01-18 05:09:34,405 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 05:09:34,405 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 05:09:34,405 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 05:09:34,405 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 05:09:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 05:09:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2022-01-18 05:09:34,409 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 05:09:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2022-01-18 05:09:34,409 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2022-01-18 05:09:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2022-01-18 05:09:34,409 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 05:09:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2022-01-18 05:09:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:34,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:34,410 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 05:09:34,427 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 05:09:34,610 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 05:09:34,610 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1526296936, now seen corresponding path program 585 times [2022-01-18 05:09:34,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487329135] [2022-01-18 05:09:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:34,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:34,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:34,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487329135] [2022-01-18 05:09:34,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487329135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:34,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967978309] [2022-01-18 05:09:34,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:34,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:34,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:34,670 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 05:09:34,670 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 05:09:34,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:09:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:34,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:35,066 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 05:09:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:35,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:35,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:35,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:35,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967978309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:35,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:35,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:35,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542500998] [2022-01-18 05:09:35,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:35,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:35,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:35,249 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 05:09:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:35,506 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2022-01-18 05:09:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:35,506 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 05:09:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:35,507 INFO L225 Difference]: With dead ends: 453 [2022-01-18 05:09:35,507 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 05:09:35,507 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 05:09:35,507 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 05:09:35,507 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 05:09:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 05:09:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2022-01-18 05:09:35,510 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 05:09:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-01-18 05:09:35,511 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2022-01-18 05:09:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:35,511 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-01-18 05:09:35,511 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 05:09:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-01-18 05:09:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:35,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:35,511 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 05:09:35,529 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 05:09:35,711 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 05:09:35,712 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:35,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1285535422, now seen corresponding path program 586 times [2022-01-18 05:09:35,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:35,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999779455] [2022-01-18 05:09:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:35,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:35,770 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 05:09:35,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999779455] [2022-01-18 05:09:35,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999779455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115674368] [2022-01-18 05:09:35,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:35,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:35,771 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 05:09:35,771 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 05:09:36,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:36,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:36,187 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 05:09:36,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:36,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:36,283 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 05:09:36,329 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 05:09:36,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115674368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:36,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:36,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 05:09:36,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211590456] [2022-01-18 05:09:36,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:36,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:36,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:36,330 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 05:09:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:36,522 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2022-01-18 05:09:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:36,522 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 05:09:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:36,523 INFO L225 Difference]: With dead ends: 428 [2022-01-18 05:09:36,523 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 05:09:36,523 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 05:09:36,523 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 05:09:36,523 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 05:09:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 05:09:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2022-01-18 05:09:36,526 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 05:09:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2022-01-18 05:09:36,526 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2022-01-18 05:09:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:36,526 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2022-01-18 05:09:36,526 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 05:09:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2022-01-18 05:09:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:36,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:36,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:36,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:36,727 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 05:09:36,727 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 441618932, now seen corresponding path program 587 times [2022-01-18 05:09:36,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566024640] [2022-01-18 05:09:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:36,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:36,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:36,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566024640] [2022-01-18 05:09:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566024640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:36,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339849562] [2022-01-18 05:09:36,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:36,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:36,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:36,788 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 05:09:36,788 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 05:09:37,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:09:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:37,198 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 54 treesize of output 42 [2022-01-18 05:09:37,239 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 05:09:37,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:37,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:37,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:37,349 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 05:09:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339849562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:37,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:37,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 05:09:37,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124559209] [2022-01-18 05:09:37,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:37,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:37,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:37,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:37,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:37,350 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 05:09:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:37,578 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2022-01-18 05:09:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:37,578 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 05:09:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:37,579 INFO L225 Difference]: With dead ends: 504 [2022-01-18 05:09:37,579 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 05:09:37,579 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 05:09:37,579 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 05:09:37,579 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 05:09:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 05:09:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2022-01-18 05:09:37,583 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 05:09:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2022-01-18 05:09:37,583 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2022-01-18 05:09:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2022-01-18 05:09:37,583 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 05:09:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2022-01-18 05:09:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:37,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:37,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:37,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:37,784 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 05:09:37,784 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash 465518846, now seen corresponding path program 588 times [2022-01-18 05:09:37,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155089467] [2022-01-18 05:09:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:37,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:37,844 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 05:09:37,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155089467] [2022-01-18 05:09:37,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155089467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337696285] [2022-01-18 05:09:37,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:37,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:37,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:37,845 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 05:09:37,845 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 05:09:38,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:09:38,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:38,233 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 54 treesize of output 42 [2022-01-18 05:09:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:38,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:38,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:38,371 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 24 treesize of output 24 [2022-01-18 05:09:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337696285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:38,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:38,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:38,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510731619] [2022-01-18 05:09:38,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:38,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:38,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:38,399 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 05:09:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:38,671 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2022-01-18 05:09:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:09:38,671 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 05:09:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:38,672 INFO L225 Difference]: With dead ends: 504 [2022-01-18 05:09:38,672 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 05:09:38,672 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 05:09:38,672 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 05:09:38,672 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 05:09:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 05:09:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2022-01-18 05:09:38,676 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 05:09:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2022-01-18 05:09:38,676 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2022-01-18 05:09:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:38,676 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2022-01-18 05:09:38,676 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 05:09:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2022-01-18 05:09:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:38,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:38,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:38,694 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 05:09:38,877 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 05:09:38,877 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1948653784, now seen corresponding path program 589 times [2022-01-18 05:09:38,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808917376] [2022-01-18 05:09:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:38,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:38,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808917376] [2022-01-18 05:09:38,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808917376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470609663] [2022-01-18 05:09:38,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:38,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:38,938 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 05:09:38,938 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 05:09:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:39,347 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 05:09:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:39,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:39,437 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 24 treesize of output 24 [2022-01-18 05:09:39,465 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 05:09:39,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470609663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:39,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:39,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 05:09:39,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803761173] [2022-01-18 05:09:39,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:39,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:39,466 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 05:09:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:39,722 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2022-01-18 05:09:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:39,722 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 05:09:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:39,723 INFO L225 Difference]: With dead ends: 493 [2022-01-18 05:09:39,723 INFO L226 Difference]: Without dead ends: 493 [2022-01-18 05:09:39,723 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 05:09:39,723 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 05:09:39,723 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 05:09:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-18 05:09:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2022-01-18 05:09:39,726 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 05:09:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2022-01-18 05:09:39,727 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2022-01-18 05:09:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2022-01-18 05:09:39,727 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 05:09:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2022-01-18 05:09:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 05:09:39,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:39,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:39,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Ended with exit code 0 [2022-01-18 05:09:39,928 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 05:09:39,928 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash -163774846, now seen corresponding path program 590 times [2022-01-18 05:09:39,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089393029] [2022-01-18 05:09:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:39,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:39,985 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 05:09:39,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089393029] [2022-01-18 05:09:39,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089393029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519849615] [2022-01-18 05:09:39,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:39,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:39,987 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 05:09:39,987 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 05:09:40,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:40,386 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 05:09:40,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:40,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:40,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:09:40,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519849615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:40,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:40,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 05:09:40,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399870545] [2022-01-18 05:09:40,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:40,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:09:40,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:09:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:09:40,517 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 05:09:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:40,725 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2022-01-18 05:09:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:40,725 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 05:09:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:40,726 INFO L225 Difference]: With dead ends: 483 [2022-01-18 05:09:40,726 INFO L226 Difference]: Without dead ends: 483 [2022-01-18 05:09:40,726 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 05:09:40,726 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 05:09:40,726 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 05:09:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-18 05:09:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2022-01-18 05:09:40,729 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 05:09:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2022-01-18 05:09:40,729 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2022-01-18 05:09:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:40,730 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2022-01-18 05:09:40,730 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 05:09:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2022-01-18 05:09:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:40,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:40,730 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 05:09:40,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Ended with exit code 0 [2022-01-18 05:09:40,930 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 05:09:40,930 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1181876905, now seen corresponding path program 1 times [2022-01-18 05:09:40,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438755560] [2022-01-18 05:09:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:40,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:40,973 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 05:09:40,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438755560] [2022-01-18 05:09:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438755560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629362997] [2022-01-18 05:09:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:40,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:40,974 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 05:09:40,975 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 05:09:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:41,337 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 44 treesize of output 34 [2022-01-18 05:09:41,379 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 05:09:41,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:41,566 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:41,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:41,573 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 05:09:41,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629362997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:41,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 05:09:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736860828] [2022-01-18 05:09:41,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:41,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 05:09:41,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 05:09:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:09:41,573 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 05:09:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:41,781 INFO L93 Difference]: Finished difference Result 431 states and 1262 transitions. [2022-01-18 05:09:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:41,782 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 05:09:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:41,782 INFO L225 Difference]: With dead ends: 431 [2022-01-18 05:09:41,783 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 05:09:41,783 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 05:09:41,783 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 05:09:41,783 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 05:09:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 05:09:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 335. [2022-01-18 05:09:41,786 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 05:09:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1012 transitions. [2022-01-18 05:09:41,786 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1012 transitions. Word has length 21 [2022-01-18 05:09:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:41,786 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1012 transitions. [2022-01-18 05:09:41,786 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 05:09:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1012 transitions. [2022-01-18 05:09:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:41,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:41,787 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 05:09:41,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Ended with exit code 0 [2022-01-18 05:09:41,987 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 05:09:41,987 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1459922641, now seen corresponding path program 2 times [2022-01-18 05:09:41,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:41,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82109905] [2022-01-18 05:09:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:41,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:42,035 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 05:09:42,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:42,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82109905] [2022-01-18 05:09:42,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82109905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:42,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980970366] [2022-01-18 05:09:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:42,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:42,037 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 05:09:42,037 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 05:09:42,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:42,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:42,466 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 05:09:42,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:42,627 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:42,627 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 7 treesize of output 7 [2022-01-18 05:09:42,634 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 05:09:42,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980970366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:42,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:42,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:09:42,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347398046] [2022-01-18 05:09:42,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:42,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:42,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:42,635 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 05:09:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:42,858 INFO L93 Difference]: Finished difference Result 594 states and 1763 transitions. [2022-01-18 05:09:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:42,858 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 05:09:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:42,859 INFO L225 Difference]: With dead ends: 594 [2022-01-18 05:09:42,859 INFO L226 Difference]: Without dead ends: 555 [2022-01-18 05:09:42,859 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 05:09:42,859 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 05:09:42,859 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 05:09:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-18 05:09:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 345. [2022-01-18 05:09:42,863 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 05:09:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1049 transitions. [2022-01-18 05:09:42,864 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1049 transitions. Word has length 21 [2022-01-18 05:09:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:42,864 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1049 transitions. [2022-01-18 05:09:42,864 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 05:09:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1049 transitions. [2022-01-18 05:09:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:42,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:42,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:42,881 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 05:09:43,064 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 05:09:43,065 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1035305321, now seen corresponding path program 3 times [2022-01-18 05:09:43,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:43,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601761966] [2022-01-18 05:09:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:43,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:43,170 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 05:09:43,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601761966] [2022-01-18 05:09:43,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601761966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060964671] [2022-01-18 05:09:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:43,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:43,171 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 05:09:43,172 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 05:09:43,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:43,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:43,579 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 139 treesize of output 111 [2022-01-18 05:09:43,721 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 05:09:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:43,972 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:43,972 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 7 treesize of output 7 [2022-01-18 05:09:43,979 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 05:09:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060964671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:43,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:43,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-01-18 05:09:43,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932209080] [2022-01-18 05:09:43,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 05:09:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 05:09:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:09:43,980 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 05:09:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:45,367 INFO L93 Difference]: Finished difference Result 830 states and 2343 transitions. [2022-01-18 05:09:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:09:45,368 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 05:09:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:45,369 INFO L225 Difference]: With dead ends: 830 [2022-01-18 05:09:45,369 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 05:09:45,369 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 05:09:45,369 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 05:09:45,369 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 05:09:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 05:09:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 351. [2022-01-18 05:09:45,373 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 05:09:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1073 transitions. [2022-01-18 05:09:45,374 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1073 transitions. Word has length 21 [2022-01-18 05:09:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1073 transitions. [2022-01-18 05:09:45,374 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 05:09:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1073 transitions. [2022-01-18 05:09:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:45,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:45,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:45,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Ended with exit code 0 [2022-01-18 05:09:45,575 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 05:09:45,575 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash -153227887, now seen corresponding path program 4 times [2022-01-18 05:09:45,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620225500] [2022-01-18 05:09:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:45,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:45,630 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 05:09:45,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:45,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620225500] [2022-01-18 05:09:45,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620225500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:45,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148815371] [2022-01-18 05:09:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:45,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:45,631 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 05:09:45,632 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 05:09:45,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:45,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:45,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:46,002 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 113 treesize of output 91 [2022-01-18 05:09:46,134 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 05:09:46,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:46,307 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:09:46,307 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 7 treesize of output 7 [2022-01-18 05:09:46,314 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 05:09:46,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148815371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:46,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:46,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:09:46,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764873328] [2022-01-18 05:09:46,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:46,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:46,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:46,315 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 05:09:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:46,591 INFO L93 Difference]: Finished difference Result 473 states and 1369 transitions. [2022-01-18 05:09:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:46,591 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 05:09:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:46,592 INFO L225 Difference]: With dead ends: 473 [2022-01-18 05:09:46,592 INFO L226 Difference]: Without dead ends: 422 [2022-01-18 05:09:46,592 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 05:09:46,592 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 05:09:46,592 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 05:09:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-18 05:09:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 348. [2022-01-18 05:09:46,596 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 05:09:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1059 transitions. [2022-01-18 05:09:46,596 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1059 transitions. Word has length 21 [2022-01-18 05:09:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:46,596 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1059 transitions. [2022-01-18 05:09:46,596 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 05:09:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1059 transitions. [2022-01-18 05:09:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:46,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:46,597 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 05:09:46,615 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 05:09:46,814 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 05:09:46,814 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1351909717, now seen corresponding path program 5 times [2022-01-18 05:09:46,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270909338] [2022-01-18 05:09:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:46,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:46,862 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 05:09:46,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270909338] [2022-01-18 05:09:46,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270909338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727673247] [2022-01-18 05:09:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:46,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:46,863 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 05:09:46,864 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 05:09:47,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:47,250 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 44 treesize of output 34 [2022-01-18 05:09:47,300 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 05:09:47,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:47,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:47,486 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 16 treesize of output 20 [2022-01-18 05:09:47,508 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 05:09:47,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727673247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:47,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:47,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:09:47,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832516218] [2022-01-18 05:09:47,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:47,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:47,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:47,509 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 05:09:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:47,689 INFO L93 Difference]: Finished difference Result 533 states and 1599 transitions. [2022-01-18 05:09:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:47,690 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 05:09:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:47,690 INFO L225 Difference]: With dead ends: 533 [2022-01-18 05:09:47,690 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 05:09:47,690 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 05:09:47,691 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 05:09:47,691 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 05:09:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 05:09:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 368. [2022-01-18 05:09:47,694 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 05:09:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1133 transitions. [2022-01-18 05:09:47,695 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1133 transitions. Word has length 21 [2022-01-18 05:09:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:47,695 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1133 transitions. [2022-01-18 05:09:47,695 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 05:09:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1133 transitions. [2022-01-18 05:09:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:47,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:47,696 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 05:09:47,713 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 05:09:47,896 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 05:09:47,896 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 447829617, now seen corresponding path program 6 times [2022-01-18 05:09:47,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081577973] [2022-01-18 05:09:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:47,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:47,977 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 05:09:47,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081577973] [2022-01-18 05:09:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081577973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386695714] [2022-01-18 05:09:47,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:47,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:47,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:47,978 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 05:09:47,979 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 05:09:48,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:48,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:48,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:48,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:48,497 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 05:09:48,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:48,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:48,717 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 16 treesize of output 20 [2022-01-18 05:09:48,740 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 05:09:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386695714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:48,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:48,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-01-18 05:09:48,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928296091] [2022-01-18 05:09:48,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:09:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:09:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:09:48,741 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 05:09:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:49,351 INFO L93 Difference]: Finished difference Result 798 states and 2277 transitions. [2022-01-18 05:09:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 05:09:49,351 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 05:09:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:49,352 INFO L225 Difference]: With dead ends: 798 [2022-01-18 05:09:49,352 INFO L226 Difference]: Without dead ends: 693 [2022-01-18 05:09:49,352 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 05:09:49,352 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 05:09:49,352 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 05:09:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-18 05:09:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 374. [2022-01-18 05:09:49,356 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 05:09:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1157 transitions. [2022-01-18 05:09:49,357 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1157 transitions. Word has length 21 [2022-01-18 05:09:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1157 transitions. [2022-01-18 05:09:49,357 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 05:09:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1157 transitions. [2022-01-18 05:09:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:49,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:49,358 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 05:09:49,375 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 05:09:49,571 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 05:09:49,571 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:49,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1329907051, now seen corresponding path program 7 times [2022-01-18 05:09:49,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:49,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059013969] [2022-01-18 05:09:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:49,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:49,618 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 05:09:49,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059013969] [2022-01-18 05:09:49,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059013969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233806314] [2022-01-18 05:09:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:49,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:49,619 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 05:09:49,620 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 05:09:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:49,986 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 113 treesize of output 91 [2022-01-18 05:09:50,110 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 05:09:50,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:50,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:50,312 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 16 treesize of output 20 [2022-01-18 05:09:50,333 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 05:09:50,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233806314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:50,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:50,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:09:50,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818259978] [2022-01-18 05:09:50,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:50,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:50,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:50,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:50,334 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 05:09:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:50,571 INFO L93 Difference]: Finished difference Result 551 states and 1634 transitions. [2022-01-18 05:09:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:50,572 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 05:09:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:50,572 INFO L225 Difference]: With dead ends: 551 [2022-01-18 05:09:50,572 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 05:09:50,573 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 05:09:50,573 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 05:09:50,573 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 05:09:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 05:09:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 358. [2022-01-18 05:09:50,576 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 05:09:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1096 transitions. [2022-01-18 05:09:50,577 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1096 transitions. Word has length 21 [2022-01-18 05:09:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1096 transitions. [2022-01-18 05:09:50,577 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 05:09:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1096 transitions. [2022-01-18 05:09:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:50,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:50,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:50,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Forceful destruction successful, exit code 0 [2022-01-18 05:09:50,778 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 05:09:50,778 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1658954503, now seen corresponding path program 8 times [2022-01-18 05:09:50,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:50,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050176510] [2022-01-18 05:09:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:50,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:50,840 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 05:09:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050176510] [2022-01-18 05:09:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050176510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002174426] [2022-01-18 05:09:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:50,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:50,842 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 05:09:50,842 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 05:09:51,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:51,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:51,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:51,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:51,380 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 05:09:51,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:51,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:51,675 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 05:09:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002174426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:51,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:51,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:09:51,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506473240] [2022-01-18 05:09:51,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:51,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:51,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:51,676 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 05:09:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:51,990 INFO L93 Difference]: Finished difference Result 546 states and 1598 transitions. [2022-01-18 05:09:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:51,990 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 05:09:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:51,991 INFO L225 Difference]: With dead ends: 546 [2022-01-18 05:09:51,991 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 05:09:51,991 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 05:09:51,992 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 05:09:51,992 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 05:09:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 05:09:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 370. [2022-01-18 05:09:51,995 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 05:09:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1144 transitions. [2022-01-18 05:09:51,996 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1144 transitions. Word has length 21 [2022-01-18 05:09:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:51,996 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1144 transitions. [2022-01-18 05:09:51,996 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 05:09:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1144 transitions. [2022-01-18 05:09:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:51,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:51,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:52,016 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 05:09:52,197 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 05:09:52,197 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash -776877069, now seen corresponding path program 9 times [2022-01-18 05:09:52,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:52,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678173363] [2022-01-18 05:09:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:52,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:52,259 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 05:09:52,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678173363] [2022-01-18 05:09:52,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678173363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095630575] [2022-01-18 05:09:52,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:09:52,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:52,261 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 05:09:52,261 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 05:09:52,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:09:52,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:52,709 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 54 treesize of output 42 [2022-01-18 05:09:52,788 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 05:09:52,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:52,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:52,921 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 152 treesize of output 130 [2022-01-18 05:09:53,029 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 05:09:53,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095630575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:53,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:53,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:09:53,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667735935] [2022-01-18 05:09:53,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:53,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:09:53,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:09:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:09:53,030 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 05:09:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:53,413 INFO L93 Difference]: Finished difference Result 519 states and 1515 transitions. [2022-01-18 05:09:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:09:53,413 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 05:09:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:53,414 INFO L225 Difference]: With dead ends: 519 [2022-01-18 05:09:53,414 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 05:09:53,414 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 05:09:53,414 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 05:09:53,414 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 05:09:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 05:09:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 364. [2022-01-18 05:09:53,417 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 05:09:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1120 transitions. [2022-01-18 05:09:53,418 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1120 transitions. Word has length 21 [2022-01-18 05:09:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1120 transitions. [2022-01-18 05:09:53,418 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 05:09:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1120 transitions. [2022-01-18 05:09:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:53,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:53,419 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 05:09:53,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Ended with exit code 0 [2022-01-18 05:09:53,619 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 05:09:53,619 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:53,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1312106871, now seen corresponding path program 10 times [2022-01-18 05:09:53,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:53,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114830310] [2022-01-18 05:09:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:53,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:53,722 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 05:09:53,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:53,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114830310] [2022-01-18 05:09:53,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114830310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:53,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519806139] [2022-01-18 05:09:53,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:09:53,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:53,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:53,723 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 05:09:53,723 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 05:09:54,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:09:54,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:54,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:54,217 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 24 treesize of output 20 [2022-01-18 05:09:54,251 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 05:09:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:54,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:54,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:54,448 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 05:09:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519806139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:54,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:54,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-01-18 05:09:54,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076780391] [2022-01-18 05:09:54,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 05:09:54,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 05:09:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 05:09:54,449 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 05:09:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:55,628 INFO L93 Difference]: Finished difference Result 631 states and 1814 transitions. [2022-01-18 05:09:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 05:09:55,628 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 05:09:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:55,629 INFO L225 Difference]: With dead ends: 631 [2022-01-18 05:09:55,629 INFO L226 Difference]: Without dead ends: 492 [2022-01-18 05:09:55,629 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 05:09:55,629 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 05:09:55,629 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 05:09:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-18 05:09:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 361. [2022-01-18 05:09:55,633 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 05:09:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1106 transitions. [2022-01-18 05:09:55,634 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1106 transitions. Word has length 21 [2022-01-18 05:09:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:55,634 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1106 transitions. [2022-01-18 05:09:55,634 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 05:09:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1106 transitions. [2022-01-18 05:09:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:55,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:55,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:55,651 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 05:09:55,834 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 05:09:55,834 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1253114675, now seen corresponding path program 11 times [2022-01-18 05:09:55,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:55,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685640723] [2022-01-18 05:09:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:55,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:55,882 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 05:09:55,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:55,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685640723] [2022-01-18 05:09:55,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685640723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:55,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516985964] [2022-01-18 05:09:55,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:09:55,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:55,884 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 05:09:55,884 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 05:09:56,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:56,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:56,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:56,303 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 05:09:56,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:56,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:56,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:56,482 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 05:09:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516985964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:56,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 05:09:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717382913] [2022-01-18 05:09:56,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:09:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:09:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:09:56,483 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 05:09:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:56,668 INFO L93 Difference]: Finished difference Result 600 states and 1753 transitions. [2022-01-18 05:09:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:56,668 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 05:09:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:56,669 INFO L225 Difference]: With dead ends: 600 [2022-01-18 05:09:56,669 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 05:09:56,669 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 05:09:56,669 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 05:09:56,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 157 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 05:09:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 05:09:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 370. [2022-01-18 05:09:56,673 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 05:09:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1131 transitions. [2022-01-18 05:09:56,674 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1131 transitions. Word has length 21 [2022-01-18 05:09:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:56,674 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1131 transitions. [2022-01-18 05:09:56,674 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 05:09:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1131 transitions. [2022-01-18 05:09:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:56,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:56,674 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 05:09:56,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Ended with exit code 0 [2022-01-18 05:09:56,874 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 05:09:56,875 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1242113287, now seen corresponding path program 12 times [2022-01-18 05:09:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973315417] [2022-01-18 05:09:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:56,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:56,928 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 05:09:56,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:56,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973315417] [2022-01-18 05:09:56,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973315417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:56,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371055882] [2022-01-18 05:09:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:09:56,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:56,930 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 05:09:56,930 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 05:09:57,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:09:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:57,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:57,431 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 05:09:57,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:57,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:57,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:57,683 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 05:09:57,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371055882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:57,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:57,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:09:57,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312993396] [2022-01-18 05:09:57,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:57,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:57,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:57,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:57,684 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 05:09:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:57,935 INFO L93 Difference]: Finished difference Result 697 states and 2015 transitions. [2022-01-18 05:09:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:57,936 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 05:09:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:57,937 INFO L225 Difference]: With dead ends: 697 [2022-01-18 05:09:57,937 INFO L226 Difference]: Without dead ends: 658 [2022-01-18 05:09:57,937 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 05:09:57,937 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 05:09:57,937 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 05:09:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-18 05:09:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 376. [2022-01-18 05:09:57,941 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 05:09:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1155 transitions. [2022-01-18 05:09:57,942 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1155 transitions. Word has length 21 [2022-01-18 05:09:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:57,942 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1155 transitions. [2022-01-18 05:09:57,942 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 05:09:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1155 transitions. [2022-01-18 05:09:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:57,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:57,942 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 05:09:57,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Ended with exit code 0 [2022-01-18 05:09:58,143 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 05:09:58,143 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -360035853, now seen corresponding path program 13 times [2022-01-18 05:09:58,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:58,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923609125] [2022-01-18 05:09:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:58,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:58,191 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 05:09:58,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923609125] [2022-01-18 05:09:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923609125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291359003] [2022-01-18 05:09:58,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:09:58,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:58,192 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 05:09:58,193 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 05:09:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:58,557 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 113 treesize of output 91 [2022-01-18 05:09:58,684 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 05:09:58,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:09:58,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:09:58,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:09:58,858 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 05:09:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291359003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:09:58,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:09:58,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 05:09:58,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746330353] [2022-01-18 05:09:58,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:09:58,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 05:09:58,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:09:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 05:09:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:09:58,859 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 05:09:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:09:59,100 INFO L93 Difference]: Finished difference Result 618 states and 1788 transitions. [2022-01-18 05:09:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:09:59,101 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 05:09:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:09:59,101 INFO L225 Difference]: With dead ends: 618 [2022-01-18 05:09:59,101 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 05:09:59,102 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 05:09:59,102 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 05:09:59,102 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 05:09:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 05:09:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 360. [2022-01-18 05:09:59,105 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 05:09:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1094 transitions. [2022-01-18 05:09:59,106 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1094 transitions. Word has length 21 [2022-01-18 05:09:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:09:59,106 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1094 transitions. [2022-01-18 05:09:59,106 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 05:09:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1094 transitions. [2022-01-18 05:09:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:09:59,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:09:59,107 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:09:59,124 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 05:09:59,307 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 05:09:59,307 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:09:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:09:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash 946069889, now seen corresponding path program 14 times [2022-01-18 05:09:59,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:09:59,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491387238] [2022-01-18 05:09:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:09:59,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:09:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:09:59,367 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 05:09:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:09:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491387238] [2022-01-18 05:09:59,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491387238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:09:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869209133] [2022-01-18 05:09:59,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:09:59,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:09:59,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:09:59,368 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 05:09:59,368 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 05:09:59,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:09:59,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:09:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:09:59,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:09:59,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:09:59,912 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 05:09:59,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:00,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:00,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:00,163 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 05:10:00,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869209133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:00,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:00,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:10:00,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398610743] [2022-01-18 05:10:00,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:00,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:10:00,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:10:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:10:00,164 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 05:10:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:00,419 INFO L93 Difference]: Finished difference Result 574 states and 1658 transitions. [2022-01-18 05:10:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:10:00,419 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 05:10:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:00,420 INFO L225 Difference]: With dead ends: 574 [2022-01-18 05:10:00,420 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 05:10:00,420 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 05:10:00,420 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 05:10:00,420 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 05:10:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 05:10:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 372. [2022-01-18 05:10:00,424 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 05:10:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1142 transitions. [2022-01-18 05:10:00,425 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1142 transitions. Word has length 21 [2022-01-18 05:10:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:00,425 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1142 transitions. [2022-01-18 05:10:00,425 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 05:10:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1142 transitions. [2022-01-18 05:10:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:00,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:00,425 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 05:10:00,443 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 05:10:00,626 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 05:10:00,626 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1828147323, now seen corresponding path program 15 times [2022-01-18 05:10:00,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:00,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63949316] [2022-01-18 05:10:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:00,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:00,693 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 05:10:00,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63949316] [2022-01-18 05:10:00,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63949316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016351953] [2022-01-18 05:10:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:00,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:00,694 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 05:10:00,695 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 05:10:01,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:10:01,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:10:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:01,170 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 64 treesize of output 50 [2022-01-18 05:10:01,263 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 05:10:01,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:01,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:01,391 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 114 treesize of output 100 [2022-01-18 05:10:01,475 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 05:10:01,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016351953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:01,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:01,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:10:01,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887296842] [2022-01-18 05:10:01,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:01,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:10:01,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:10:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:10:01,476 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 05:10:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:01,851 INFO L93 Difference]: Finished difference Result 586 states and 1669 transitions. [2022-01-18 05:10:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:10:01,851 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 05:10:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:01,852 INFO L225 Difference]: With dead ends: 586 [2022-01-18 05:10:01,852 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 05:10:01,852 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 05:10:01,852 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 05:10:01,852 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 05:10:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 05:10:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 366. [2022-01-18 05:10:01,856 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 05:10:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1118 transitions. [2022-01-18 05:10:01,856 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1118 transitions. Word has length 21 [2022-01-18 05:10:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1118 transitions. [2022-01-18 05:10:01,856 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 05:10:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1118 transitions. [2022-01-18 05:10:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:01,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:01,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:01,875 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 05:10:02,057 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 05:10:02,057 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1292917521, now seen corresponding path program 16 times [2022-01-18 05:10:02,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:02,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473843450] [2022-01-18 05:10:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:02,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:02,106 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 05:10:02,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473843450] [2022-01-18 05:10:02,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473843450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528307260] [2022-01-18 05:10:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:02,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:02,107 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 05:10:02,107 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 05:10:02,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:02,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:10:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:02,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:02,616 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 05:10:02,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:02,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:02,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:02,841 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 05:10:02,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528307260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:02,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:02,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 05:10:02,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96435723] [2022-01-18 05:10:02,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:02,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 05:10:02,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 05:10:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 05:10:02,842 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 05:10:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:03,096 INFO L93 Difference]: Finished difference Result 508 states and 1463 transitions. [2022-01-18 05:10:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:10:03,096 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 05:10:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:03,097 INFO L225 Difference]: With dead ends: 508 [2022-01-18 05:10:03,097 INFO L226 Difference]: Without dead ends: 445 [2022-01-18 05:10:03,097 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 05:10:03,097 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 05:10:03,097 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 05:10:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-18 05:10:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 350. [2022-01-18 05:10:03,101 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 05:10:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1057 transitions. [2022-01-18 05:10:03,101 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1057 transitions. Word has length 21 [2022-01-18 05:10:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:03,101 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1057 transitions. [2022-01-18 05:10:03,101 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 05:10:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1057 transitions. [2022-01-18 05:10:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:03,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:03,102 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 05:10:03,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Ended with exit code 0 [2022-01-18 05:10:03,302 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 05:10:03,302 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:03,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1986305687, now seen corresponding path program 17 times [2022-01-18 05:10:03,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:03,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324631200] [2022-01-18 05:10:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:03,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:03,373 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 05:10:03,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324631200] [2022-01-18 05:10:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324631200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360830817] [2022-01-18 05:10:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:03,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:03,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:03,374 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 05:10:03,375 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 05:10:03,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:10:03,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 05:10:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:03,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:03,974 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 05:10:03,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:04,170 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:04,170 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 114 treesize of output 95 [2022-01-18 05:10:04,220 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 05:10:04,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360830817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:04,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:04,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:10:04,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318799439] [2022-01-18 05:10:04,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:04,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:10:04,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:10:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:10:04,221 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 05:10:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:04,606 INFO L93 Difference]: Finished difference Result 568 states and 1640 transitions. [2022-01-18 05:10:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:10:04,606 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 05:10:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:04,606 INFO L225 Difference]: With dead ends: 568 [2022-01-18 05:10:04,607 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 05:10:04,607 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 05:10:04,607 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 05:10:04,607 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 05:10:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 05:10:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 368. [2022-01-18 05:10:04,610 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 05:10:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1129 transitions. [2022-01-18 05:10:04,618 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1129 transitions. Word has length 21 [2022-01-18 05:10:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:04,618 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1129 transitions. [2022-01-18 05:10:04,618 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 05:10:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1129 transitions. [2022-01-18 05:10:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:04,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:04,618 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 05:10:04,636 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 05:10:04,818 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 05:10:04,819 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1426584175, now seen corresponding path program 18 times [2022-01-18 05:10:04,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:04,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753273990] [2022-01-18 05:10:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:04,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:04,882 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 05:10:04,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753273990] [2022-01-18 05:10:04,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753273990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826299099] [2022-01-18 05:10:04,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:04,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:04,884 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 05:10:04,884 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 05:10:05,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:10:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:10:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:05,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:05,446 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 05:10:05,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:05,612 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:05,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:05,673 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 05:10:05,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826299099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:05,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:05,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:10:05,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656626209] [2022-01-18 05:10:05,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:05,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:10:05,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:10:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:10:05,674 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 05:10:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:06,127 INFO L93 Difference]: Finished difference Result 580 states and 1651 transitions. [2022-01-18 05:10:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:10:06,127 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 05:10:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:06,128 INFO L225 Difference]: With dead ends: 580 [2022-01-18 05:10:06,128 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 05:10:06,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:10:06,128 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 05:10:06,128 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 05:10:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 05:10:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 362. [2022-01-18 05:10:06,132 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 05:10:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1105 transitions. [2022-01-18 05:10:06,133 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1105 transitions. Word has length 21 [2022-01-18 05:10:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:06,133 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1105 transitions. [2022-01-18 05:10:06,133 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 05:10:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1105 transitions. [2022-01-18 05:10:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:06,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:06,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:06,151 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 05:10:06,333 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 05:10:06,334 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1961813977, now seen corresponding path program 19 times [2022-01-18 05:10:06,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980889963] [2022-01-18 05:10:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:06,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:06,392 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 05:10:06,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980889963] [2022-01-18 05:10:06,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980889963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:06,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271346330] [2022-01-18 05:10:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:06,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:06,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:06,394 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 05:10:06,394 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 05:10:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:10:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:06,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:06,935 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 05:10:06,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:07,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:07,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:07,157 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 05:10:07,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271346330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:07,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:07,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:10:07,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805181663] [2022-01-18 05:10:07,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:10:07,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:10:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:10:07,158 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 05:10:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:07,528 INFO L93 Difference]: Finished difference Result 567 states and 1601 transitions. [2022-01-18 05:10:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:10:07,529 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 05:10:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:07,529 INFO L225 Difference]: With dead ends: 567 [2022-01-18 05:10:07,529 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 05:10:07,530 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 05:10:07,530 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 05:10:07,530 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 05:10:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 05:10:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 356. [2022-01-18 05:10:07,533 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 05:10:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1081 transitions. [2022-01-18 05:10:07,534 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1081 transitions. Word has length 21 [2022-01-18 05:10:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:07,534 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1081 transitions. [2022-01-18 05:10:07,534 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 05:10:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1081 transitions. [2022-01-18 05:10:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:07,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:07,534 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:10:07,551 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 05:10:07,734 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 05:10:07,735 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1320460787, now seen corresponding path program 20 times [2022-01-18 05:10:07,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:07,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589344963] [2022-01-18 05:10:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:07,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:07,783 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 05:10:07,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:07,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589344963] [2022-01-18 05:10:07,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589344963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074894534] [2022-01-18 05:10:07,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:10:07,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:07,784 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 05:10:07,785 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 05:10:08,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:08,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 05:10:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:08,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:08,291 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 05:10:08,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:08,423 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:08,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:08,509 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 05:10:08,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074894534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:08,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:08,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 05:10:08,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727650238] [2022-01-18 05:10:08,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:08,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 05:10:08,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 05:10:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 05:10:08,510 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 05:10:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:08,859 INFO L93 Difference]: Finished difference Result 496 states and 1421 transitions. [2022-01-18 05:10:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:10:08,859 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 05:10:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:08,860 INFO L225 Difference]: With dead ends: 496 [2022-01-18 05:10:08,860 INFO L226 Difference]: Without dead ends: 421 [2022-01-18 05:10:08,860 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 05:10:08,860 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 05:10:08,860 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 05:10:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-18 05:10:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 356. [2022-01-18 05:10:08,863 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 05:10:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1075 transitions. [2022-01-18 05:10:08,864 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1075 transitions. Word has length 21 [2022-01-18 05:10:08,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:08,864 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1075 transitions. [2022-01-18 05:10:08,864 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 05:10:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1075 transitions. [2022-01-18 05:10:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:08,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:08,865 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 05:10:08,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Ended with exit code 0 [2022-01-18 05:10:09,065 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 05:10:09,065 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1946770262, now seen corresponding path program 591 times [2022-01-18 05:10:09,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641973084] [2022-01-18 05:10:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:09,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:09,162 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 05:10:09,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641973084] [2022-01-18 05:10:09,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641973084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641749421] [2022-01-18 05:10:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:09,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:09,163 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 05:10:09,164 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 05:10:09,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:10:09,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:09,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:10,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:10,224 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 05:10:10,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:10,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:10,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:10,721 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 05:10:10,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641749421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:10,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:10,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 05:10:10,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030791192] [2022-01-18 05:10:10,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:10,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:10,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:10,722 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 05:10:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:11,571 INFO L93 Difference]: Finished difference Result 1006 states and 3006 transitions. [2022-01-18 05:10:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 05:10:11,571 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 05:10:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:11,573 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 05:10:11,573 INFO L226 Difference]: Without dead ends: 894 [2022-01-18 05:10:11,573 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 05:10:11,573 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 05:10:11,573 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 05:10:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-18 05:10:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 423. [2022-01-18 05:10:11,579 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 05:10:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1280 transitions. [2022-01-18 05:10:11,580 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1280 transitions. Word has length 21 [2022-01-18 05:10:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:11,580 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1280 transitions. [2022-01-18 05:10:11,580 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 05:10:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1280 transitions. [2022-01-18 05:10:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:11,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:11,580 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 05:10:11,598 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 05:10:11,781 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 05:10:11,781 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1314032818, now seen corresponding path program 592 times [2022-01-18 05:10:11,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146336329] [2022-01-18 05:10:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:11,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:11,920 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 05:10:11,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146336329] [2022-01-18 05:10:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146336329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277678258] [2022-01-18 05:10:11,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:11,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:11,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:11,922 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 05:10:11,922 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 05:10:12,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:12,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:13,216 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 05:10:13,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:13,684 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:13,684 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 152 treesize of output 119 [2022-01-18 05:10:13,736 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 05:10:13,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277678258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:13,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 05:10:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198765263] [2022-01-18 05:10:13,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:13,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:10:13,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:10:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:10:13,737 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 05:10:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:14,997 INFO L93 Difference]: Finished difference Result 961 states and 2830 transitions. [2022-01-18 05:10:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 05:10:14,997 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 05:10:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:14,999 INFO L225 Difference]: With dead ends: 961 [2022-01-18 05:10:14,999 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 05:10:14,999 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 05:10:14,999 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 05:10:14,999 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 05:10:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 05:10:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 435. [2022-01-18 05:10:15,005 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 05:10:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1327 transitions. [2022-01-18 05:10:15,006 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1327 transitions. Word has length 21 [2022-01-18 05:10:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:15,006 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1327 transitions. [2022-01-18 05:10:15,006 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 05:10:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1327 transitions. [2022-01-18 05:10:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:15,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:15,006 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 05:10:15,024 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 05:10:15,206 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 05:10:15,207 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 139499422, now seen corresponding path program 593 times [2022-01-18 05:10:15,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120624623] [2022-01-18 05:10:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:15,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:15,346 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 05:10:15,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120624623] [2022-01-18 05:10:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120624623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627289355] [2022-01-18 05:10:15,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:10:15,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:15,347 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 05:10:15,348 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 05:10:15,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:15,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:16,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 05:10:16,286 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 05:10:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:16,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:16,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:16,848 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 05:10:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627289355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:16,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:16,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-01-18 05:10:16,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923244774] [2022-01-18 05:10:16,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:16,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 05:10:16,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 05:10:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2022-01-18 05:10:16,849 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 05:10:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:20,088 INFO L93 Difference]: Finished difference Result 1182 states and 3512 transitions. [2022-01-18 05:10:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:10:20,088 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 05:10:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:20,090 INFO L225 Difference]: With dead ends: 1182 [2022-01-18 05:10:20,090 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 05:10:20,091 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 05:10:20,091 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 05:10:20,091 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 05:10:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 05:10:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 466. [2022-01-18 05:10:20,097 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 05:10:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1429 transitions. [2022-01-18 05:10:20,098 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1429 transitions. Word has length 21 [2022-01-18 05:10:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:20,098 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1429 transitions. [2022-01-18 05:10:20,098 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 05:10:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1429 transitions. [2022-01-18 05:10:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:20,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:20,099 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 05:10:20,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Forceful destruction successful, exit code 0 [2022-01-18 05:10:20,299 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 05:10:20,299 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -326937394, now seen corresponding path program 594 times [2022-01-18 05:10:20,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:20,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298763534] [2022-01-18 05:10:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:20,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:20,397 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 05:10:20,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298763534] [2022-01-18 05:10:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298763534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431581851] [2022-01-18 05:10:20,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:10:20,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:20,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:20,398 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 05:10:20,399 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 05:10:20,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:10:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:21,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:21,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:21,463 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 05:10:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:21,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:21,869 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 121 treesize of output 105 [2022-01-18 05:10:22,018 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 05:10:22,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431581851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:22,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:22,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 05:10:22,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373676113] [2022-01-18 05:10:22,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:22,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:22,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:22,019 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 05:10:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:22,929 INFO L93 Difference]: Finished difference Result 1217 states and 3655 transitions. [2022-01-18 05:10:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 05:10:22,929 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 05:10:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:22,931 INFO L225 Difference]: With dead ends: 1217 [2022-01-18 05:10:22,931 INFO L226 Difference]: Without dead ends: 1105 [2022-01-18 05:10:22,931 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 05:10:22,931 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 223 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 05:10:22,931 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 05:10:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-01-18 05:10:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 453. [2022-01-18 05:10:22,938 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 05:10:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1397 transitions. [2022-01-18 05:10:22,938 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1397 transitions. Word has length 21 [2022-01-18 05:10:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:22,939 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1397 transitions. [2022-01-18 05:10:22,939 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 05:10:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1397 transitions. [2022-01-18 05:10:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:22,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:22,939 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 05:10:22,957 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 05:10:23,139 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 05:10:23,140 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1205270994, now seen corresponding path program 595 times [2022-01-18 05:10:23,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077239926] [2022-01-18 05:10:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:23,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:23,248 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 05:10:23,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:23,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077239926] [2022-01-18 05:10:23,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077239926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:23,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476702060] [2022-01-18 05:10:23,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:10:23,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:23,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:23,249 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 05:10:23,249 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 05:10:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 05:10:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:23,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:23,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:24,052 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 05:10:24,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:24,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:24,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:24,469 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 05:10:24,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476702060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:24,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:24,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 05:10:24,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524238962] [2022-01-18 05:10:24,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:24,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 05:10:24,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:24,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 05:10:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 05:10:24,470 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 05:10:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:25,141 INFO L93 Difference]: Finished difference Result 842 states and 2588 transitions. [2022-01-18 05:10:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 05:10:25,141 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 05:10:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:25,142 INFO L225 Difference]: With dead ends: 842 [2022-01-18 05:10:25,142 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 05:10:25,142 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 05:10:25,143 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 139 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 05:10:25,143 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 05:10:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 05:10:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 489. [2022-01-18 05:10:25,148 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 05:10:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1515 transitions. [2022-01-18 05:10:25,149 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1515 transitions. Word has length 21 [2022-01-18 05:10:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:25,149 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1515 transitions. [2022-01-18 05:10:25,149 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 05:10:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1515 transitions. [2022-01-18 05:10:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:25,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:25,149 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 05:10:25,167 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 05:10:25,350 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 05:10:25,350 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1064814312, now seen corresponding path program 596 times [2022-01-18 05:10:25,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:25,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179438763] [2022-01-18 05:10:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:25,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:25,507 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 05:10:25,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179438763] [2022-01-18 05:10:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179438763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805085089] [2022-01-18 05:10:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:10:25,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:25,508 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 05:10:25,509 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 05:10:25,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:10:25,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:25,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:26,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:26,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:26,753 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 05:10:26,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:27,264 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 05:10:27,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:27,315 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 05:10:27,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805085089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:27,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 05:10:27,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738747138] [2022-01-18 05:10:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 05:10:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 05:10:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-01-18 05:10:27,316 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 05:10:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:28,376 INFO L93 Difference]: Finished difference Result 896 states and 2717 transitions. [2022-01-18 05:10:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 05:10:28,376 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 05:10:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:28,378 INFO L225 Difference]: With dead ends: 896 [2022-01-18 05:10:28,378 INFO L226 Difference]: Without dead ends: 881 [2022-01-18 05:10:28,378 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 05:10:28,378 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 05:10:28,378 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 05:10:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-18 05:10:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 504. [2022-01-18 05:10:28,384 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 05:10:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1568 transitions. [2022-01-18 05:10:28,385 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1568 transitions. Word has length 21 [2022-01-18 05:10:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:28,385 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1568 transitions. [2022-01-18 05:10:28,385 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 05:10:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1568 transitions. [2022-01-18 05:10:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:28,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:28,386 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 05:10:28,403 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 05:10:28,602 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 05:10:28,602 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 388717928, now seen corresponding path program 597 times [2022-01-18 05:10:28,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:28,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760743822] [2022-01-18 05:10:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:28,708 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 05:10:28,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760743822] [2022-01-18 05:10:28,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760743822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338858884] [2022-01-18 05:10:28,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:10:28,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:28,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:28,710 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 05:10:28,710 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 05:10:29,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:10:29,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:29,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:29,899 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 05:10:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:10:30,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 05:10:30,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 05:10:30,489 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 05:10:30,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338858884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:10:30,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:10:30,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 05:10:30,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748555670] [2022-01-18 05:10:30,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:10:30,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 05:10:30,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:10:30,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 05:10:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-01-18 05:10:30,490 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 05:10:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:10:31,361 INFO L93 Difference]: Finished difference Result 959 states and 2908 transitions. [2022-01-18 05:10:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 05:10:31,362 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 05:10:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:10:31,363 INFO L225 Difference]: With dead ends: 959 [2022-01-18 05:10:31,363 INFO L226 Difference]: Without dead ends: 858 [2022-01-18 05:10:31,363 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 05:10:31,363 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 05:10:31,364 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 05:10:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-18 05:10:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 522. [2022-01-18 05:10:31,370 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 05:10:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1629 transitions. [2022-01-18 05:10:31,371 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1629 transitions. Word has length 21 [2022-01-18 05:10:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:10:31,371 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1629 transitions. [2022-01-18 05:10:31,371 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 05:10:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1629 transitions. [2022-01-18 05:10:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 05:10:31,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:10:31,372 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 05:10:31,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Ended with exit code 0 [2022-01-18 05:10:31,572 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 05:10:31,572 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 05:10:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:10:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash -689083144, now seen corresponding path program 598 times [2022-01-18 05:10:31,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:10:31,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085158791] [2022-01-18 05:10:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:10:31,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:10:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:10:31,680 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 05:10:31,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:10:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085158791] [2022-01-18 05:10:31,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085158791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:10:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472110125] [2022-01-18 05:10:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:10:31,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:10:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:10:31,681 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 05:10:31,682 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 05:10:32,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:10:32,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:10:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 05:10:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:10:32,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 05:10:32,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 05:10:32,790 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 05:10:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-18 05:10:33,162 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 05:10:33,180 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 05:10:33,189 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 05:10:33,205 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 05:10:33,375 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 05:10:33,375 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. [2022-01-18 05:10:33,377 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 05:10:33,377 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 05:10:33,377 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 05:10:33,379 INFO L732 BasicCegarLoop]: Path program histogram: [598, 20, 1, 1] [2022-01-18 05:10:33,380 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 05:10:33,380 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 05:10:33,381 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:10:33 BasicIcfg [2022-01-18 05:10:33,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 05:10:33,381 INFO L158 Benchmark]: Toolchain (without parser) took 798077.98ms. Allocated memory was 411.0MB in the beginning and 637.5MB in the end (delta: 226.5MB). Free memory was 371.6MB in the beginning and 577.1MB in the end (delta: -205.5MB). Peak memory consumption was 24.7MB. Max. memory is 16.0GB. [2022-01-18 05:10:33,381 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 411.0MB. Free memory is still 372.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:10:33,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.29ms. Allocated memory is still 411.0MB. Free memory was 371.5MB in the beginning and 370.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 05:10:33,381 INFO L158 Benchmark]: Boogie Preprocessor took 11.17ms. Allocated memory is still 411.0MB. Free memory was 370.0MB in the beginning and 368.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 05:10:33,382 INFO L158 Benchmark]: RCFGBuilder took 373.45ms. Allocated memory is still 411.0MB. Free memory was 368.9MB in the beginning and 354.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-18 05:10:33,382 INFO L158 Benchmark]: TraceAbstraction took 797673.14ms. Allocated memory was 411.0MB in the beginning and 637.5MB in the end (delta: 226.5MB). Free memory was 354.0MB in the beginning and 577.1MB in the end (delta: -223.1MB). Peak memory consumption was 5.8MB. Max. memory is 16.0GB. [2022-01-18 05:10:33,382 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 411.0MB. Free memory is still 372.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 17.29ms. Allocated memory is still 411.0MB. Free memory was 371.5MB in the beginning and 370.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 11.17ms. Allocated memory is still 411.0MB. Free memory was 370.0MB in the beginning and 368.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 373.45ms. Allocated memory is still 411.0MB. Free memory was 368.9MB in the beginning and 354.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 797673.14ms. Allocated memory was 411.0MB in the beginning and 637.5MB in the end (delta: 226.5MB). Free memory was 354.0MB in the beginning and 577.1MB in the end (delta: -223.1MB). Peak memory consumption was 5.8MB. 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 backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - 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 backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - 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 backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - 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 backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 797.6s, OverallIterations: 620, TraceHistogramMax: 2, PathProgramHistogramMax: 598, EmptinessCheckTime: 0.3s, AutomataDifference: 238.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74927 SdHoareTripleChecker+Valid, 119.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 74927 mSDsluCounter, 118356 SdHoareTripleChecker+Invalid, 98.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2160 IncrementalHoareTripleChecker+Unchecked, 210137 mSDsCounter, 6183 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 364284 IncrementalHoareTripleChecker+Invalid, 372627 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6183 mSolverCounterUnsat, 12216 mSDtfsCounter, 364284 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 33232 GetRequests, 18302 SyntacticMatches, 307 SemanticMatches, 14623 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68042 ImplicationChecksByTransitivity, 217.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=522occurred in iteration=619, InterpolantAutomatonStates: 6323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 619 MinimizatonAttempts, 111081 StatesRemovedByMinimization, 616 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 313.9s InterpolantComputationTime, 24745 NumberOfCodeBlocks, 24745 NumberOfCodeBlocksAsserted, 1806 NumberOfCheckSat, 35247 ConstructedInterpolants, 47 QuantifiedInterpolants, 253824 SizeOfPredicates, 8849 NumberOfNonLiveVariables, 55680 ConjunctsInSsa, 12516 ConjunctsInUnsatCore, 1853 InterpolantComputations, 2 PerfectInterpolantSequences, 2576/7435 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